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🍏Physics Paper 2 Flashcards

1
Q

Phys: what are the 3 ways of accelerating

A
  • Speeding up
  • Slowing down
  • Changing direction (because velocity is a vector quantity)
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2
Q

Phys: what is the equation for acceleration

A

a = F/m

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3
Q

Phys: how do you find distance on a velocity time graph

A

Area under the line

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4
Q

Phys: what is a longitudinal wave

A

It is a wave where vibrations of the particles is parallel to the direction of the wave

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5
Q

Phys: what is a transverse wave

A

Vibrations are perpendicular to the direction of energy transfer

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6
Q

Phys: how do you calculate wave period

A

Wave period = 1/ frequency

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7
Q

Phys: how do you calculate frequency

A

Frequency=number of oscillations/time

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8
Q

Phys: how do you calculate wavespeed

A

Wavespeed = frequency x wavelength

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9
Q

Phys: what is a rarefraction

A

This is a reduction in density

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10
Q

Phys: what are p-waves

A

They are longitudinal pressure waves

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11
Q

Phys: what happens to the particles after a longditudional wave passes through them

A

They stay in the same position as before the wave came

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12
Q

Phys: what is wave period

A

It is the time for one wave to pass

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13
Q

Phys: what are electromagnetic waves

A

They are transverse waves that travel at the same speed in the same medium, roughly 300,000,000 m/s in vaccum

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14
Q

Phys: what are the 7 main types of electromagnetic wave is order of frequency from high to low

A

Gamma, x-ray, ultraviolet, visible, infrared, microwave, radiowave

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15
Q

Phys: what are the uses of gamma waves

A

Medical therapy, astronomy, steralisation

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16
Q

Phys: what are the uses of x-rays

A

To treat cancer and to diagnose injury

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17
Q

Phys: what are the uses of ultraviolet rays

A

Sun tanning, disinfecting, photography for medicine and forensics

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18
Q

Phys: what are the uses of visible light rays

A

Screens, vision

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19
Q

Phys: what are the uses of infrared rays

A

Tv remotes, security

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20
Q

Phys: what are the uses of microwaves

A

Signal transmission
Heating up food 🥐🥐🥐

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21
Q

Phys: what are the uses of radiowaves

A

Radio and communication

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22
Q

Phys: what is the range of human hearing

A

20-20000Hz

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23
Q

Phys: what is infrasound

A

Sound below 20Hz

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24
Q

Phys: what is ultrasound

A

Sound above 20000Hz

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25
Q

Phys: what is a photon and how fast do they move

A

They are packets of energy and travel at 300,000,000 m/s in a vacuum

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26
Q

Phys: what is a wave

A

They vibrate and oscilate and transfer energy without transferring mass

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27
Q

Phys: what is the rest position for a wave also known as

A

Equilibrium

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28
Q

Phys: what is the speed of sound in air and what affects this speed

A

330 m/s, the warmer the air the sound travels faster.

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29
Q

Phys: what happens to the speed of sound when the medium gets more rigid

A

The speed gets faster

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30
Q

Phys: how does adding particles to a gas container increase the pressure

A

Increased frequency of collisions between particles and walls so greater force per unit area

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31
Q

Phys: why does a container of gas get warmer when you condense it quickly

A

Because you do work on the gas increasing the ke and so heat

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32
Q

phys: what is the equation for force with acceleration

A

F = MA

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33
Q

phys: what is the equation for frequency

A

Frequency = number of oscillations / time

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34
Q

phys: what is the equation for wave period

A

1 / frequency

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35
Q

phys: what is the equation for wave speed

A
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36
Q

phys: what is the rest point of a wave called

A

equilibrium

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37
Q

phys: describe the magnetic field around a flowing charge

A

It forms a magnetic field in concentric circles around the charge

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38
Q

phys: what happens to the magnetic field if you increase current

A

It increases

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39
Q

phys: what is a solenoid

A

It is a coil of wire

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40
Q

phys: describe the magnetic field of a solenoid with flowing charge

A
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41
Q

phys: what is the equation for pressure

A

Pressure = force / area

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42
Q

Phys: what is the: crest, trough, equilibrium/rest position, amplitude and wavelength of a wave

A
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43
Q

Phys: is momentum vector or scalar

A

Vector

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44
Q

Phys: what is the equation for momentum with mass

A
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45
Q

Phys: how do you find distance traveled on a velocity time graph

A

Find the area under the line

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46
Q

Phys: what is happening at each point on the velocity time graph

A
  • A - accelerating
  • B- constant velocity
  • C - accelerating
  • D - constant velocity
  • E - decelerating
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47
Q

Phys: what is an elastic object

A

It is an object that returns to its original shape and size when a compression/tension force is released. This is called elastic deformation.

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48
Q

Phys: what is a plastic object

A

It is an object that will not return to its original size and shape when a compression/tension force is released. This is called plastic deformation.

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49
Q

Phys: what is a tension force

A

A force that pulls apart

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50
Q

Phys: what are the 8 types of contact force

A
  • friction
  • drag
  • air resistance
  • water resistance
  • tension/elastic
  • normal contact
  • thrust
  • lift
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51
Q

Phys: what are the 3 non-contact forces

A
  • gravitational
  • magnetic
  • electrostatic
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52
Q

Phys: what is an interaction pair of forces

A

It is a pair of forces that are equal and opposite

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53
Q

Phys: what is the centre of mass of an object

A

It is the place in an object where the weight appears to act from

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54
Q

Phys: what is the law of conservation of momentum

A

Momentum before and event = momentum after an event

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55
Q

Phys: what is inertia

A

The tendency to continue doing what your already doing

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56
Q

Phys: what are the properties of permanent magentisim

A
  • they are always magnetic
  • their magnetic field has a norths nod a South Pole
  • when they are near a magnetic material they cause it to become a magnet
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57
Q

Phys: what are the 3 magnetic elements (+plus the other material you must know)

A

Nickel, iron, cobalt and you must know steel for the exams

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58
Q

Phys: what causes Magnetisim

A

a uniform direction of Electron spins

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59
Q

Phys what does the electron spin look like in magnetic materials vs non magnetic ones

A

In magnetic materials the electron spins are in the same orientation, they are not in non magnetic materials

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60
Q

Phys: what is a magnetic domain

A

It is a region in a magnetic field where the magnetic fields are in a uniform direction

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61
Q

Phys: what are the properties of induced magnets

A
  • they have a north and South Pole (temporarily) and a magnetic field
  • they can only be attracted by magnets and not repeled
  • they are only magnets in another magnetic field
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62
Q

Phys: describe the magnetic field inside a solenoid with flowing charge

A

It is strong and uniform

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63
Q

Phys: what is an inelastic collision

A

A collision where the objects have no elasticity and so collide and stay together

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64
Q

Phys: What is the equation for change in momentum

A
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65
Q

Phys: Why does a crash mat work to slow soften an impact

A

• Increasing time taken to stop, decreases the rate of change of momentum
• This reduced the force one the person
• Leading to less damage

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66
Q

Phys: what is the electromagnetic spectrum

A
  • it is a collection of waves each of which exists over a variety of wavelengths
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67
Q

Phys: what do waves transfer

A

Energy and information

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68
Q

Phys: what is it called when a wave passes through a clear surface

A

It is transmitted through the surface

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69
Q

Phys: what type of wave has the longest wavelength

A

Radiowaves

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70
Q

Phys: what are the properties of waves with short wavelengths

A
  • shorter distance
  • more information
  • less spreading out
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71
Q

Phys: how do antennae work

A

When an electromagnetic wave hits an ariel it induces an alternating current in the antennae with the same frequency as the wave, this allows for information to be transferred.

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72
Q

Phys: why are microwaves and not Radiowaves used for satellite communication

A

Because Radiowaves cannot penetrate the atmosphere and so microwaves have to be used.

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73
Q

Phys: how do microwaves heat food

A

They vibrate the water molecules in the food and so cause it to heat

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74
Q

Phys: why do microwaves not affect you

A

Because of the mesh that has a smaller diameter than the amplitude of the wave

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75
Q

Phys: what are the risks of uv radiation

A

Skin cancer and eyedamage(sunglasses)

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76
Q

Phys: what part of the human body can be ionised

A

the atoms in the cells

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77
Q

Phys: how are atoms ionised

A
  • electron hit by ionising radiation
  • gains enough energy to escape the atom
  • this creates an ion
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78
Q

Phys: what does the plum pudding model of the atom look like

A
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79
Q

Phys: what does the nuclear model of the atom look like

A
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80
Q

Phys: what does the Bohr model of the atom look like

A

Energy levels

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81
Q

Phys: what does the model of the atom that Chadwick developed look like

A
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82
Q

Phys: how are radio-waves produced

A

Radiowaves are produced by oscillating current in an arial or circuit with the same freq as the current

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83
Q

Phys: if light enters a denser or less dense medium and it doesn’t refract what angle has it entered or exited the medium

A

It has entered or exited at the same angle as the normal

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84
Q

Phys: toward what does light bend when it enters a denser medium

A

Toward the normal

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85
Q

Phys: toward what does light bend when it enters a less denser medium

A

Away from the normal

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86
Q

Phys: what is the incident ray

A

The incoming ray

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87
Q

Phys: what is the ray after the incident ray that in inside the new medium

A

Refracted ray

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88
Q

Phys: what is the ray exiting the material

A

Emergent/transmitted ray

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89
Q

Phys: How do you calculate change in momentum

A

Change in momentum = mass x change in velocity

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90
Q

Phys: how do you calculate force with momentum

A

Force = (change in momentum)/time

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91
Q

Phys: what happens to all emitted waves when temperature is increased

A

The greater the intensity of all emitted waves and the peak emitted wavelength us shorter add photo

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92
Q

Phys: what happens to all emitted waves when temperature is decreased

A

The weaker the intensity of all emitted waves and the peak emitted wavelength is longer

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93
Q

Phys: why is the moon classed as a satellite

A

Because it orbits a planet

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94
Q

Phys: what magnetic field lines are closer together what is it called

A

Denser lines of flux

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95
Q

Phys: how does gravity affect the motion of a satellite

A
  • creates a resultant force that causes acceleration
  • it changes direction of resultant force which accelerates the satellite, which changes velocity as it is a vector
  • change in velocity is acceleration
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96
Q

Phys: what is a moment

A

It is the turning effect of a force

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97
Q

Phys what is the equation for a moment

A

Moment = force x distance (from pivot)

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98
Q

Phys: what do compression and tension forces do

A

They stretch or compress and do work

99
Q

Phys: what is doing work

A

Transferring energy

100
Q

Phys: what does a tension force do

A

It stretches an object

101
Q

Phys: what does a compression force do

A

It compresses an object

102
Q

Phys: When the line on this graph is not straight when it is a measure of an elastic object, what has happened

A

It means that the spring has reached and passed its elastic limit and causes permanent plastic deformation

103
Q

Phys: what is hooke’s law

A

It is a law that states that for an elastic object force is directly proportional the extension

104
Q

Phys: how do you find the spring constant for a spring with a force extension graph

A

Spring constant = 1 / gradient

105
Q

Phys: what is a resultant moment

A

It is a moment when the clockwise and anticlockwise aspects are not in balance

106
Q

Phys: what do we use leavers and gears to do

A

We use them to transmit the rotational effect of forces from one place to another (to make the force input less)

107
Q

Phys: what are 2 properties of gears

A
  • they have interlocking teeth, so that I one gear is turned then the other is also
  • they transmit rotational effect, from one place to annother
108
Q

Phys: what are different sized gears used for

A

They are used to change the moment of a force, if we send a force to a larger gear there will be a bigger moment

109
Q

Phys: what is pressure measured in

110
Q

Phys: what is the force similar to buoyancy caused by water

111
Q

Phys: if an object is resting on the ground what force must counteract weight

A

Normal contact of ground + others such as upthrust possibly

112
Q

Phys: in equations what unit is used for area

A

Meters squared

113
Q

Phys: what unit is used for pressure

A

Pa convert if you have kPa

114
Q

Phys: what height is used in the atmospheric pressure equation, pressure = h x g x dencity

A

The height of the column above the point messured

115
Q

Phys: How to find the average density of a colunm of fluid with changing density

A

Average density = pressure difference / (height x gravity)

116
Q

Phys: when a liquid is heated it is the atmospheric pressure that stops the liquid from boiling, why would this mean that it is harder to cook something in water at sea level as opposed to the top of Everest

A

A liquid boils at a temperature at which its vapour pressure is equal to the pressure of the gas above the liquid. The lower the pressure of the gas above the liquid, the lower the temperature at which the liquid will boil

117
Q

Phys: what is Newton’s first law (law of inertia)

A

An object in motion will remain in motion in constant speed and direction unless acted on by an unbalanced force

118
Q

Phys: what is Newton’s third law

A

Every action has an equal and opposite reaction

119
Q

Phys what is stopping distance

A

Thinking distance + braking distance

120
Q

Phys: what is the principle of moments (needed for balance)

A

Clockwise moment = anti-clockwise moment

121
Q

Phys: in this equation, what is v and u

122
Q

Revise the motor effect and amke flashcardcard

123
Q

Phys: what is a magnetic field

A

It is region around a magnet where another magnet or moving charged particle will be affected

124
Q

Phys: Left hand rule

A

This is it

125
Q

Phys: What is a split ring commutator

A

A ring on a DC motor with 2 gaps, leading to the polarity of the current being reversed every half rotation and allowing the motor to rotate continuously

126
Q

Phys: why does light bend like it does in the diagram

A
  • slows down and bends towards the normal
  • speeds up as it exits and bends away from the normal
127
Q

Phys: what are the primary colours

A
  • red
  • green
  • blue
    RGB
128
Q

Phys: what are the 3 secondary colours

A
  • yellow, green and red
  • magenta, red and blue
  • cyan, blue and green
129
Q

Phys: how do you make yellow with 2 primary colours

A

Red and green

130
Q

Phys: how do you make magenta with 2 primary colours

A

Red + blue

131
Q

Phys: how do you make cyan with 2 primary colours

A

Blue + green

132
Q

Phys: when white light shines on a blue selling what light reflects

A

Blue light is reflected and other colours are absorbed

133
Q

Phys: when white light is shone through a yellow filter what happens

A

Blue light is absorbed but not red or green as they make yellow, they are transmitted

134
Q

Phys: what is it called when light goes through a filter

A

It is transmitted through the filter

135
Q

Phys: why do some objects appear white

A

They reflect all wavelengths of light

136
Q

Myhyperopia

137
Q

Phys: is background radiation ionising

138
Q

Phys: what are 2 man made sources of radiation

A
  • nuclear power
  • medical
139
Q

Phys: what are 2 natural sources of background radiation

A
  • cosmic rays p
  • food
  • rocks
140
Q

Phys: what conclusions can you draw

A
  • all galaxies are moving away from the sun because they are all red shifted
  • c is moving away fastest as it is the most red shifted and is the furthest away as it is the most red shifted
141
Q

Phys: how does the Big Bang theory describe the universe as it began

A

It was hot and dense

142
Q

Describe the universe before it began

A

Hot and dense

143
Q

Phys: how does red shift from distant galaxies provide evidence for the beginning of the universe

144
Q

Phys: How does redshift show the universe started in one point

A

Red shift shows galaxies are moving away
More distant galaxies=more redshift
There is a single point of origin
More distant galaxies move away faster

145
Q

Phys: what is a typical walking speed

146
Q

Phys: what is a typical running speed

147
Q

Phys: what is a typical cycling speed

148
Q

Phys: why is the vertical resultant force if someone standing still 0

A

Because they are not accelerating

149
Q

Phys: if force stays the same and friction decreases what happens to resultant force

A

Resistive forces decrease so resultant force increases

150
Q

Phys: complete the diagram, what type of lens is it

151
Q

Phys: complete the diagram, what type of lens is it

152
Q

Phys: complete the diagram, what type of lens is it

153
Q

Phys: what type wave is a sound wave

A
  • longditudional
  • mechanical
154
Q

Phys: what is a mechanical wave

A

It is a wave that needs matter to travel

155
Q

Phys: label a sound wave

156
Q

Phys: how are frequency and amplitude linked to the sound of a sound wave

A
  • freq - higher freq higher pitched sound
  • amplitude - higher amplitude larger volume
157
Q

P and n on battery circuit diagram

158
Q

phys: what is a vector quantity

A

it is a quantity with magnitude and direction

159
Q

phys: how can a vector quantity be represented

A
  • it can be represented by an arrow
  • the length represents the magnitude of the force
  • the direction represents the direction of the vector quantity
160
Q

phys: what type of quantity is force

A

it is a vector quantity

161
Q

phys: what is the equation for weight

A

weight = mass x gravitational field strength

162
Q

phys: what is gravitational field strength measured in in the equation for weight

A

newtons per kilogram

163
Q

phys: where does the weight of an object act from

A

a single point called its center of mass

164
Q

phys: what property does the weight and mass of an object have

A

the weight and mass of an object are directly proportional

165
Q

phys: how is the weight of an object measured

A

using a calibrated spring balance

166
Q

phys: what happens when a force causes an object to move through a distance

A

work is done on the object

167
Q

phys: what does work do to an object

A

it causes it to move through a disacnce

168
Q

phys: when force causes displacement of an object what does it do the the object

169
Q

phys: when is one joule of work done

A

when a force of one newton causes a displacement of 1 meter

170
Q

phys: what does one joule =

A

1 joule = 1 newton-meter

171
Q

phys: when an object is stretched or compressed why must more than one force act on it

A

because one force will cause movement, check

172
Q

phys: what is the extension of an elastic object directly proportional to

A

the force applied to the object, provided the limit of proportionality is not exceeded

173
Q

phys:

174
Q

phys: when the relationship between force and extension in a spring is non-linear what has happned

A

the limit of proportionality has been passed and permanent plastic deformation has happened, check

175
Q

phys: what is an example of a transverse wave that is not electromagnetic

A

ripples on water surface

176
Q

phys: what can happen to waves at the boundary between 2 different materials

A
  • the wave could be reflected
  • the wave could be transmitted and if there is a change in velocity there could be a refraction
177
Q

phys: how does the ear work

A
  • within the ear sound waves cause the ear drum to vibrate
  • these vibrations cause the sensation of sound
  • the conversion of these waves to sounds only works over a limited frequency range which restrict the limits of human hearing
178
Q

phys: in different substances what do the absorption reflection and transmition of waves depend on

A

the wavelength of the wave, check if more cards on this

179
Q

phys: how can radio waves be produced

A

by oscillations in electrical circuits

180
Q

phys: what 2 types of changes in atoms that can cause electromagnetic waves to be released

A
  • a change in the nuclei of an atom
  • changes of an atom
    check
181
Q

phys: what does the effect of radiation depend on

A
  • the type of radiation
  • size of the dose
182
Q

phys: what is the size of radiation dose measured in

A

sieverts check

183
Q

phys: what can UV waves cause

A
  • skin to age prematurely
  • an increased risk of skin cancer
184
Q

phys: what can X and gamma rays cause

A

they are ionising radiation and so can cause mutations of genes and cancer

185
Q

Phys: what is a black body

A

A perfect black body is an object that absorbs all of the radiation incident on it. It does not reflect or transmit any radiation. Since a good absorber is also a good emitter a perfect black body would be the best possible emitter

186
Q

Phys: what do all bodies do in terms of radiation

A
  • all bodies emit radiation
  • the intensity and wavelength distribution of any emission depends on the temp of the body
187
Q

Phys: in terms of radiation what does a body at a constant temperature do

A

It absorbs and emits radiation at the same rate

188
Q

Phys: what happens to a body when it absorbs radiation at a faster rate than it emits it

A

The bodies temperature increases

189
Q

Phys: what, in terms of radiation does the temperature of the earth depend on, and what else

A
  • many factors
  • the rate of absorption and emission of radiation
  • the reflection of radiation into space
190
Q

Phys: what are the poles of a magnet

A

They are the regions in a magnetic field where it is strongest

191
Q

Phys: what happens when 2 magnets are brought close together

A

They exert a force on one another

192
Q

Phys: what is a magnetic field

A

It is the region around a magnet where a force acts on another magnet or on a magnetic material

193
Q

Phys: what is the force between a magnet and a magnetic material

A

It is always a force of attraction

194
Q

Phys: what does the stregnth of a magnetic field depend on

A

distance from the magnet

195
Q

Phys: where is a magnetic field strongest

A

It is strongest at the poles of the magnet

196
Q

Phys: how do you find the direction of a magnetic field at any point

A

It is the direction of the force that would act on another north pole placed at that point, it is the line from the north pole of the magnet to the south

197
Q

Phys: how does a compass work

A
  • compasses contain a small bar magnet
  • the earth has a magnetic field
  • the compass needle points in the direction of the earth’s magnetic field
198
Q

Phys: (magnetism) what happens when current flows though a conducting wire

A

A magnetic field is produced, its strength depends on the current through the wire and the distance from the wire

199
Q

Phys: by changing the shape of a straight wire how can you increase the magnetic field

A

Shaping it to form a solenoid

200
Q

Phys: how can you increase the strength of the magnetic field of a solenoid

A

You can add an iron core

201
Q

Phys: what is an electromagent

A

It is a solenoid with an iron core

202
Q

Phys: for a conductor at rright angles to a magnetic field carrying a current what is the equation for the force

A

Force = flux density X current x length

203
Q

Phys: what must you know that is in our solar system

A
  • one star (the sun)
  • 8 planets orbiting the sun
  • dwarf planets
  • natural satellites (moons)
204
Q

Phys: what is our solar system a small part of

A

The milky way (our galaxy)

205
Q

Phys: how was the sun formed

A

It was formed from a cloud of dust and gas pulled together by gravity

206
Q

Phys: how are stars formed in nebulae

A

At the beginning of the stars lifecycle dust and gas from a nebula is pulled together until the conditions are met for fusion to occur, the pressure from the fusion reactions and the gravitational collapse of the star reach equilibrium

207
Q

Phys: what is the life cycle for a star of a similar size of the sun

A
  • protostar
  • main sequence
  • red giant
  • white dwarf
  • black dwarf
208
Q

Phys: what is the life cycle for a star much larger than the size of the sun

A
  • protostar
  • main sequence
  • red super giant
  • supernova
  • either a neutron star or a black hole
209
Q

Phys: what factor determines the life cycle of a star

A

The size of the star

210
Q

Phys: what produces all of the naturally occurring elements

A

Fusion processes

211
Q

Phys: what distributes elements around the universe

A

The explosions of massive stars (supernova)

212
Q

Phys: how do fusion processes lead to the formation of new elements

213
Q

Phys: in a stable orbit, if the speed changes what must happen

A

The radius of the orbit must change, check

214
Q

Phys: there are still many things that we do not know about the universe, what is ane example

A
  • dark mass
  • dark energy
215
Q

Phys: what is red shift in relation to the big bang

A

There is an observed increase into the wavelength of light from the most distant galaxies (red shift), the further away they are the faster they are moving and the bigger the observed red shift, this is evidence for the big bang as it shows the universe is expanding
Check and possible question change

216
Q

Phys: what does the big bang theory suggest about the origins of the universe

A

That it began from a very small region that was extremely hot and dense

217
Q

Phys: what do observation of distant supernovae suggest, since when

A

Since 1998 onwards observation of supernovae suggest that distance galaxies are reseding even faster

218
Q

Create flashcard on this

219
Q

Phys: what 2 things can be used to transmit rotational effect

A
  • gears
  • levers
220
Q

Phys: how does pressure in fluids cause a pressure at the normal

221
Q

How do gears and levers transmit rotational effect

222
Q

Phys: what is area measured in

A

Meters squared

223
Q

Phys: what can extension be in the equation force = spring constant x extension

A
  • compression
  • extension
224
Q

Phys: what does a force that stretches (or compressed) do

A
  • it does work
  • stores elastic potential energy in a spring
225
Q

Phys: if a spring is compressed or extended, and the elastic limit has not been surpassed, what is the relationship between work done and EPE stroed

A

They are equal

226
Q

Phys: what is height normally measured in in most equations

227
Q

Phys: how does buoyancy work

A
  • a partially (or totally) submerged object experiences a greater pressure on the bottom surface than the top
  • this created a resultant force upwards
  • this is called upthrust
228
Q

Phys: waght factors affect floating and skinking

A
  • volume and shape
  • density (greater density than the liquid and it will sink and less and it will float)
229
Q

Phys: if an object has a greater density that a liquid that it is placed on the top of, what will happen?

A

It will sink

230
Q

Phys: what is the atmosphere

A

It is a thin layer (relative to the size of the earth) of air around the earth.

231
Q

Phys: what happens to the atmosphere when altitude increases

A

The density of the atmosphere gets less

232
Q

Phys: what creates atmospheric pressure

A

Air molecules colliding with a surface

233
Q

Phys: what happens to the atmospheric pressure with increasing height

A
  • the number of air molecules (and so the weight of air) above a surface decreases as the height of the surface above the ground increases
  • so as height increases there is always less air above a surface than there is at a lower height
  • so atmospheric pressure decreases with increasing height
234
Q

Phys: what is distance

A

It is how far an object moves (without direction), so is scalar

235
Q

Phys: what is displacement

A

It includes distance moved, measured in a straight line from start point to finish, and the direction of that straight line, so is vector

236
Q

Phys: what is the gradient of an objects distance time graph

237
Q

Phys: how can you measure the speed of an accelerating object from a distance time graph

A

Draw a tangent, measure the gradient

238
Q

Phys: how can the acceleration of an object be calculated from its velocity time graph

A

Calculating the gradient

239
Q

Phys: what does this equation apply to

A

uniform acceleration

240
Q

Phys: what can breaking distance be affected by

A

Adverse road and weather conditions and poor condition of the vehicle

241
Q

Phys: what do adverse road conditions include

A

Wet or icy conditions

242
Q

Phys: what I’d poor road conditions limited to

A

They vehicles breaks or tires

243
Q

Phys: what must the transfers be in for the law of conservation of momentum to be in place

A

In a closed system, check

244
Q

Phys: force = (something of) momentum

A

Rate of change of momentum

GCSEs (35 decks)

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