CP1 Motion

Question 1

Speed

Answer 1

A measure of the distance an object travels in a given time

Question 2

What is the usual unit for speed?

Answer 2

Metres per second (m/s)

Question 3

Is speed a vector or scalar? Why?

Answer 3

Scalar, because it only has a magnitude (size) and doesn’t have a direction

Question 4

What is the typical speed for walking?

Answer 4

1.5 m/s

Question 5

What is the typical speed for running?

Answer 5

3.0 m/s

Question 6

What is the typical speed of cycling?

Answer 6

6.0 m/s

Question 7

What is the typical speed range of a car?

Answer 7

13.0 - 30.0 m/s

Question 8

What is the typical speed of a steam train?

Answer 8

50 m/s

Question 9

What is the typical speed of a plane?

Answer 9

250 m/s

Question 10

How do you calculate speed?

Answer 10

Speed = distance / time
s = d / t

Question 11

A car travels 2000 meters in 80 seconds. How fast was it travelling?

Answer 11

25 m/s
2000 / 80 = 25

Question 12

A person jogs 300 metres in 1 minute and 20 seconds. How fast were they travelling?

Answer 12

3.75 m/s
300 / 80 = 3.75

Question 13

What is the speed of sound in the air?

Answer 13

330 m/s

Question 14

A car travels 500m in 50s, then. 1500m in 75s. Calculate its average speed for the whole journey.

Answer 14

Average speed = 16 m/s
500 + 1500 = 2,000
50 + 75 = 125
2,000 / 125 = 16

Question 15

What pieces of lab equipment are used to measure speeds more accurately?

Answer 15

Light gates

Question 16

Why is using a stopwatch not the most accurate way of measuring time?

Answer 16

Human error and delayed human reaction time

Question 17

What’s the difference between a vector and a scalar?

Answer 17

A vector quantity has both direction and magnitude, whereas a scalar only has magnitude

Question 18

Scalar Quantity

Answer 18

A scalar quantity is one that only has a magnitude, and no specific direction

Question 19

Vector Quantity

Answer 19

A vector quantity is one that has both a magnitude and a direction

Question 20

Is displacement a scalar or vector quantity?

Answer 20

Vector

Question 21

Is energy a vector or scalar quantity?

Answer 21

Scalar

Question 22

Is momentum a vector or scalar quantity?

Answer 22

Vector

Question 23

Is acceleration a vector or scalar quantity?

Answer 23

Vector

Question 24

Is speed a vector or scalar quantity?

Answer 24

Scalar

Question 25

Is force a vector or scalar quantity?

Answer 25

Vector

Question 26

Velocity

Answer 26

Velocity is the distance travelled per unit of time in a stated direction.

Question 27

Distance

Answer 27

A description of how far apart two things are

Question 28

Displacement

Answer 28

The distance travelled in a specific direction

Question 29

Acceleration

Answer 29

Acceleration is the rate of change in velocity - how much the velocity of an object is changing per second

Question 30

In which two ways can velocity change?

Answer 30

The object’s speed can change The object can change direction