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CCEA GCSE Physics > Motion > Flashcards

Motion Flashcards

1
Q

What are Scalars and Vectors?

2 marks

A

The physical quantities (of motion) measured by a scientist.

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2
Q

What is the main difference between a Scalar and a Vector?

3 marks

A

The direction of movement shows the difference between a Scolar and Vector quantity - the difference between the speed of an object and it’s velocity.

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3
Q

What are the types of motion (2 main categories)?

2 marks

A

Scalars and Vectors

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4
Q

Define Motion

(3 marks)

A

Motion is the movement of an object or the change in position compared to a place/object that is not moving.

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5
Q

What is the place or object that is not moving, in the study of motion?

(1 mark)

A

The place or object that is not moving, in the study of motion is called the frame of reference.

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6
Q

What is a physical quantity?

1 mark

A

Something that can be measured.

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7
Q

What are Scalar Quantities made up of (what do they have)?

2 marks

A

Size (or magnitude)

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8
Q

What do Vector Quantities have?

2 marks

A

Size and direction

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9
Q

What is not important in ‘speed’ (a scalar quantity)?

1 mark

A

Direction

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10
Q

What is important in ‘velocity’ (a Vector Quantity)?

1 mark

A

Direction

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11
Q

Give examples of Scalar Quantities used in Physics.

5 marks

A
  • Mass
  • Distance
  • Speed
  • Rate of change of speed
  • Time
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12
Q

Give examples of Vector Quantities used in Physics.

5 marks

A
  • Displacement
  • Velocity
  • Acceleration
  • Force
  • Weight
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13
Q

What is Speed?

5 marks

A
  • Measure of how fast something is travelling.
  • It is the distance travelled in 1 second (or in 1 hour)
  • It’s measured in m/s or km/h (or mph in UK cars)
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14
Q

Speed =

2 marks

A

Distance Travelled / Time Taken

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15
Q

Can be calculated using the DST triangle

3 marks

A

Distance, Speed, Time

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16
Q

How to use the DST triangle

1 mark

A

Cover the letter you want to find to get the Formula.

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17
Q

D =

2 marks

A

S x T

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18
Q

S =

2 marks

A

D / T

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19
Q

T

2 marks

A

D / S

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20
Q

Distance =

2 marks

A

Speed x Time

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21
Q

Speed =

2 marks

A

Distance x Time

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22
Q

Time =

2 marks

A

Distance / Speed

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23
Q

S x T =

1 mark

A

D

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24
Q

D / T =

1 mark

A

S

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25
Q

D / S =

1 mark

26
Q

If a car travels 24m in 2s - what is the speed?

4 marks

A

S = D / T

24/ 2 = 12 m/s

S = 12 m/s

27
Q

Speed x Time =

1 mark

28
Q

Distance / Time =

1 mark

29
Q

Distance / Speed =

1 mark

30
Q

If the initial speed and final speed of an object are known - what can be calculated?

(1 mark)

A

The average speed.

31
Q

Average Speed =

2 marks

A

(Initial Speed + Final Speed) / 2

32
Q

(Initial Speed + Final Speed) / 2 =

1 mark

A

Average Speed

33
Q

A car travelling at 22 m/s increases its speed to 30 m/s - Find it’s average speed over the journey.

(4 marks)

A

AS = (IS + FS) / 2

(22 + 30) / 2
= 52 m/s / 2
= 26 m/s

34
Q

AS =

2 marks

A

(IS + FS) / 2

35
Q

(IS + FS) / 2 =

1 mark

36
Q

2 Equations for Average Speed

5 marks

A

Average Speed = Total Distance / Total Time

Average Speed = (Initial Speed + Final Speed) / 2

37
Q

Distance Travelled / Time Taken =

1 mark

38
Q

How do you decide which Average Speed Equation to use?

1 mark

A

Looking at the quantities given.

39
Q

What is a Scalar Quantity? (Explained)

5 marks

A

Scalar Quantity is the quantity which has magnitude (size) but no specific direction.

  • It is completely described by a numerical value and an appropriate unit.
  • They change when the magnitude (size) changes.
40
Q

Examples of Scalar Quantities

4 marks

A

Mass (e.g. 500 kg) and temperature (e.g. 100°C).

41
Q

What is a Vector Quantity? (Explained)

3 marks

A

Vector Quantity is the quantity which has both magnitude (size) and a specific direction.

42
Q

Example of a Vector Quantity

3 marks

A

Force is an example of a vector quantity because it is only completely defined by stating the size of the force and the direction in which it acts.

43
Q

Vector quantities change when

4 marks

A

When their:

  • Magnitude (size) changes
  • Direction changes
  • Magnitude (size) and direction changes.
44
Q

Scalar Quantity: Distance

1 mark

A

Distance is a measure of how far an object moves.

45
Q

Scalar Quantity: Speed

1 mark

A

Speed is the measure of how fast an object is moving.

46
Q

Scalar Quantity: Mass

1 mark

A

Mass is a measure of the amount of matter in an object.

47
Q

Scalar Quantity: Energy

2 marks

A

Energy is the ability to do work. This only requires a numerical value with its unit to define it.

48
Q

Example of Energy

1 mark

A

The electric kettle transferred 2000 Joules of energy.

49
Q

Vector Quantity: Displacement

2 marks

A

Displacement is the distance travelled in a particular direction from a specified point.

50
Q

Example of Displacement (Physics)

1 mark

A

100 meters south east.

51
Q

Vector Quantity: Velocity

1 mark

A

Velocity is the speed in a stated direction.

52
Q

Example of Velocity

1 mark

A

100 km/h south east

53
Q

Vector Quantity: Weight

2 marks

A

Weight is the force by which the earth attracts a body towards its centre.

54
Q

Example of Weight

1 mark

A

10,000 Newton’s

55
Q

Vector Quantity: Acceleration

2 marks

A

Acceleration is the rate of change of velocity in a stated direction.

56
Q

Example of Acceleration

1 mark

A

m/s2 to the left.

57
Q

Example of Distance

1 mark

A

100 metres.

58
Q

Example of Speed

1 mark

59
Q

Example of Mass

1 mark

60
Q

Vector Quantity: Force

1 mark

A

Force is a push or a pull in a particular direction.

61
Q

Example of Force

3 marks

A

A frictional force of 10 N to the right - tells us it is in the opposite direction to the motion of an object.

62
Q

Momentum

4 marks

A

Momentum is the product of mass and velocity - the direction of the momentum is stated by the direction given by the velocity.

CCEA GCSE Physics (2 decks)

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