Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

GCSE Physics Topic 5-7 > 5-7 > Flashcards

5-7 Flashcards

1
Q

What is a scalar?

A

Just a number ( E.g distance, mass, speed)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a vector?

A

A number and direction (E.g displacement, weight, acceleration, force and momentum)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does the resultant force equal?

A

Resultant force = difference between forces.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Equation for weight?

A

w = m x g
weight - (n)
mass - (kg)
gravity - (n/kg)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the equation for work?

A

w = f x s
work - (j)
force - (n)
distance - (m)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is 1 Joule equal to?

A

1 Joule is equal to 1 N/m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is Hooke’s law?

A

When you exert a force on an object it is going to be squashed, stretched or deformed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What happens to a spring if you attach more weight?

A

More weights added = longer spring.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the limit of proportionality?

A

Where no matter how much more weight is added the spring will not stretch any further.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the equation for acceleration?

A

a = (change in) velocity/time
acceleration - (m/s^2)
velocity - (m/s)
time - (s)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Change in velocity equation?

A 
v^2-u^2 = 2 x a x s
v(final velocity) - (m/s)
u(initial velocity) - (m/s)
a(acceleration) - (m/s^2)
s(distance) - (m)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Speed of free fall and also gravity?

A 
s= 9.8m/s
g= 9.8n/kg)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

When is terminal velocity reached?

A

When all forces are balanced.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Equation for Force?

A

f = k x e
Force - (n)
Spring constant (k) - (n/m)
extension (e) - (m)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Kinetic Energy equation?

A

Ek = 1/2 x m x v^2
Kinetic energy (Ek) - (J)
Mass (m) - (kg)
Velocity (v^2) - (m/s)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Equation for pressure?

-Involving force and area

A

P = F/A
Pressure (P) - (Pa_Paschal)
Force (F) - (N)
Area (A) - (m^2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Equation for distance?

A

s = v x t
Distance (s) - (m)
Velocity (v) - (m/s)
Time (t) - (s)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Pressure equation?

-Involving height, density and gravitation field strength

A

P = h x p x g
Pressure (P) - (Pa_ paschal)
Height (h)- (m)
Gravitational Field Strength (g) - (9.8n/kg)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Liquids are…

A

Incompressible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Gases are…

A

Compressible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Equation for Force?

-Involving mass and acceleration

A

F = m x a

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Stopping Distance =

A

Thinking Distance + Braking Distance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Things that effect thinking distance?

A

Alcohol, drugs, Tiredness (Positive is Caffeine)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Things that Effect Braking Distance?

A

Conditions of tyres
Condition of road
Weight of car

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Car Safety?

A

Seat belts
Baby seat
Crumple Zones
Airbag

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Momentum equation?

-Involves mass and velovity

A

P = m x v

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What is the law of conservation of momentum?

A

Momentum is always conserved so the moment before = moment afterwards

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What is inertia?

A

An object that is in motion will remain in motion, unless acted on by and outside force.
An object in rest will remain in rest unless acted by an outside force.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

What is Newton’s third law?

A

Where for every action there is an equal and opposite reaction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

The law of conservation of energy?

A

Energy is never created or destroyed, only transformed into something else. (Usually Heat)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

What do we use to measure the speed of a wave?

A

Ripple Tank

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Equation for wave speed?

A

Wave speed = f x wavelength (lamba)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Radio waves have what sort of energy? frequency? and wavelength?

A

Low energy
Low frequency
Long wavelengths

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

Gamma rays have what sort of energy? frequency? and wavelength?

A

High energy
High frequency
Short wavelength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Transverse waves movement?

A

Up and down

36
Q

Longitudinal wave movement?

A

Sideways (to the right)

37
Q

Low frequency means..

A

Not many peaks but a high wavelength.

38
Q

High frequency means..

A

Lots of peaks but a low wavelength.

39
Q

Frequency is..

A

Number of waves per second.

40
Q

To calculate frequency?

A

T = 1/f

f- frequency

41
Q

Rare fraction and compression on a longitudinal wave?

A

Rare fraction = not many dots

Compression = lots of dots together

42
Q

Good absorbers:
Good emitters:
Good reflectors:

A

Good absorbers: dark and matt
Good emitters: dark and matt
Good reflectors: shiny

43
Q

How can you induce a magnet?

A

You can induce a magnet by putting something in the magnetic field.

44
Q

Magnetic materials?

A

Iron Nickel Cobalt

45
Q

What is diffraction?

A

Diffraction happens when a wave passes through a gap, the wave will curve around as it comes out that gap. The amount of curviture (diffraction) depends on the size of the gap.

46
Q

What is refraction?

A

Refraction is when a wave passes from one medium to another medium. It will change direction because the wave changes speed but different part of the wave changes speed at different points.

47
Q

How can you change the strength of an electromagnet?

A

Change current

Change amount of coils

48
Q

Left hand rule- fingers

A

Thumb is Movement
Index finger is field
Current is middle finger

49
Q

How can you make an electro magnet?

A

Battery Wire Iron Nail

50
Q

How does electromagnetism work?

A
  1. When a current is passed through a wire it creates a magnetic field around the wire.
  2. This in turn strongly magnetises the iron bar.
  3. Thus creating the electromagnet.
51
Q

How does a Moving coil loudspeaker work?

A

Works by making a diaphragm attached to a coil vibrate.

  • Current is passed through coil, this generates a force.
  • Each change in direction causes a change in vibration in the diaphragm.
52
Q

How does a Moving coil microphone work?

A

Vibration causes the coil to move past a magnet, generating current.

  • Vibration causes coil to move past a magnet, generating current.
53
Q

Force is greatest when the wire is _______ with the magnetic field lines.

A

Perpendicular.

54
Q

The force is 0 when the magnetic field lines are _______.

A

Parallel.

55
Q

What is magnetic flux density?

A

Amount of magnetic flux in a certain area.

56
Q

Force equation?

- Involves magnetic flux density, current and length

A

F = B x I x L

57
Q

Sound waves are what waves?

A

Longitudinal.

58
Q

Range of human hearing?

A

20Hz to 20KHz

59
Q

What can ultra sound be used for?

A

Determining distance + pregnancy.

60
Q

Speed equation?

-Involving distance and time

A

S = D/T

61
Q

Unbalanced forces have what forces?

A

Unequal.

62
Q

Balanced force have what forces?

A

Equal.

63
Q

Moment equation?

- Involving force and distance

A

M = f x d

64
Q

Force equation?

- Involving mass and velocity and time

A

f = (mx change in velocity)/change in time

65
Q

Angle of incidence =

A

Angle of reflection

66
Q

When sound waves are reflected they..

A

Echo

67
Q

What are p waves + properties?

A

Primary waves

  • longitudinal
  • solids and liquids
68
Q

What are s waves + properties?

A

Secondary waves

  • transverse
  • solids
69
Q

What do converging lenses do?

A

Correct long sightedness

  • real image
  • magnified
70
Q

What do diverging lenses do?

A

Correct short sightedness

  • virtual image
  • upright
  • small
71
Q

Magnification equation?

A

Magnification = Image height/ object height (MIA)

72
Q

Red colour properties:

A

Freq = 4 x 10^14 Hz Wavelength: 7 x 10^-7m

73
Q

Violet colour properties:

A

Freq = 7 x 10^14 Hz Wavelength: 4 x 10^-7m

74
Q

Tranformer Calculations:

A

Vp/Vs= Np/Ns . Vs x Is = Vp x Ip

75
Q

Step up transformer voltage?

A

Secondary voltage Vs > Primary voltage

76
Q

Step down transformer?

A

Secondary Voltage Vs < Primary voltage

77
Q

What is a black body?

A

Black body is an object in space which absorbs radiation.

78
Q

What emits infrared radiation?

A

Everything

79
Q

The Generator Effect?

A

Movement of wire through a magnetic field produces a current.

80
Q

Plants in order

A

My Very Easy Method, Just Speeds up Naming,

81
Q

What galaxy do we live in?

A

Milky Way

82
Q

If a galaxy is coming towards us what type of light?

A

Blue shifted

83
Q

If a galaxy is moving away from us what type of light?

A

Red shifted

84
Q

What is speed?

A

How fast you are going. Scalar

85
Q

What is velocity?

A

How fast you are going in a certain direction. Vector.

86
Q

Red shifted properties?

A

Increased wavelength

Decreased frequency

87
Q

Blue shifted properties?

A

Decreased wavelength

Increased Frequency

GCSE Physics Topic 5-7 (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions