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Physics Revision EOY EXAM > Motion > Flashcards

Motion Flashcards

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1
Q

What is displacement?

A

The distance covered in a straight line

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2
Q

What is acceleration

A

A measure of how fast velocity is changing

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3
Q

What is momentum

A

A combination of mass and velocity

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4
Q

Name the calculation for speed

A

Distance(s)
—————
Time taken (s)

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5
Q

Calculation for acceleration

A

Change in velocity (m/s)
———————————-
Time taken (s)

V= final
U= initial

A= v-u
————
Time

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6
Q

What are forces

A

Vector qualities

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7
Q

What is upthrust?

A

Pushing up

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8
Q

What is weight

A

Pushing down

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9
Q

What is Newton’s first law

A

Moving objects = same speed + direction until external force acts upon it

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10
Q

What is mass?

A

Mass is the quality of matter there is in an object

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11
Q

What is the acceleration of an object

A

A measure of how much it’s velocity changes in a certain time

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12
Q

What is convection

A

A part of a fluid that is warmer than the rest rises and sets up a convection current

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13
Q

What is GPE

A

An energy that is shores because of an objects position in a gravitational field

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14
Q

How do you calculate GPE?

A

Change in gravitational potential energy(J) = mass(kg) X gravitational field strength(N/KG) X CHANGE IN VERTICAL HEIGHT

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15
Q

How do you calculate KE?

A

0.5 x m x v squared

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16
Q

What is hydroelectricity

A

It is generated by falling water in places where water can be trapped in high reservoirs

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17
Q

What are bio fuels?

A

They are used in the same way as fossil fuels, but are natural and they are plant and animal waste?

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18
Q

What are transverse waves?

A

They are waves on the surface of water

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19
Q

What are sound waves of

A

They transfer energy, they are longitudinal waves

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20
Q

What is wave frequency?

A

The number of waves passing a point each second

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21
Q

What is wavelength

A

The distance from a point on one wave to a point in the same position on the next wave (m)

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22
Q

What is the amplitude

A

The max distance from a point on the wave away from its rest position

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23
Q

Calculate speed

A

(M/s) speed= distance (m)
——————
Time (s)

24
Q

What is refraction?

A

When it changes direction, that happens at the boundary between the two media

25
Q

Name all of the EM spectrum

A 
Infared
X-ray
Gamma
Visible light 
UV
Microwaves
Radio waves
26
Q

What is infared used for

A

Communication (computers, tv etc)

27
Q

Visible light?

A

Our eyes detect. Light bulbs emit it, cameras detect it

28
Q

Microwaves?

A

Communications + satiellite transmissions

29
Q

What is radiowaves

A

Transmitting radio broadcasts and TV programmes

30
Q

UV?

A

Fluorescent materials, bulbs, sunbed

31
Q

X-rays?

A

Detect medical treatments etc

32
Q

Gamma rays

A

Kill cancer cells in radiotherapy, or detect it

33
Q

Dangers, infared?

A

Too much heat = burns

34
Q

Dangers, gamma and x rays?

A

Mutations, kills cells

35
Q

Dangers, uv?

A

Skin cancer

36
Q

Microwaves + radiowaves dangers

A

Heat cells from inside

37
Q

What is slowing down

A

Deceleration

38
Q

Force equation

A

F= MV-MU
—————-
Time

M= mass
U= initial velocity
V= final velocity
39
Q

What is chemical energy?

A

Food, fuels, batteries

40
Q

What is kinetic energy

A

Moving objects

41
Q

What is thermal energy

A

Hot objects

42
Q

What is strain or elastic potential energy

A

Stretchy or squashed objects

43
Q

What is GPE?

A

High positions

44
Q

What is atomic or nuclear energy?

A

Energy stored in atoms

45
Q

What is a Sankey diagram

A

Shows the amount of energy transferred (J)

46
Q

What does dissipated mean

A

Spread out

47
Q

Why is to harder to pedal a bicycle if the chain needs oiling

A

Because friction between moving parts can be reduced by lubrication

48
Q

What is conduction

A

When vibrations are passed on between particles in a solid

49
Q

What is Newton’s thirds law

A

About the forces on two different objects when they interact with each other

50
Q

Name an example of Newton’s third law

A

When objects touch (eg sitting on a chair)

Distance ( gravitational attraction between the earth and moon)

51
Q

When there is a pair of forces acting on two interactive objects, what is it called?

A

Action- reaction forces

52
Q

Describe the action- reaction forces when a ball bounces on the ground

A

Force from ball, force ground to ball

53
Q

What is momentum?

A

A measure of the tendency of an object to keep moving

54
Q

How is momentum calculated?

A 
Momentum = mass x velocity 
P= momentum 
                            P
             ———————
                          MXV
55
Q

What is conservation of momentum?

A

When moving objects collide the total momentum of both objects is the same before the collision as it is after.

56
Q

Equation for stopping distances

A

Stopping distance= thinking distance+ breaking distance

57
Q

What is reaction time?

A

The amount of time is takes to respond to a stimulus

Physics Revision EOY EXAM (1 decks)

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