P9

Question 1

What does the term velocity mean?

Answer 1

The speed and direction you are travelling

Question 2

Can two object moving at the same speed have a different velocity?

Answer 2

Yes, providing they are moving in a different direction

Question 3

Is the velocity of an object moving in a circle at a constant speed constant?

Answer 3

No, the direction is constantly changing, this means the object is technically accelerating

Question 4

What is acceleration?

Answer 4

The change in velocity per second

Question 5

What is the unit for acceleration?

Answer 5

m/s²

Question 6

How do you work out the average acceleration of an object?

Answer 6

acceleration = change in velocity ÷ time

Question 7

What is the actual name of ‘Deceleration?’

Answer 7

negative acceleration

Question 8

What is negative acceleration

Answer 8

Deceleration is the change of velocity per second when the object slows down

Question 9

What is the speed equation?

Answer 9

speed = distance travelled / time taken

Question 10

What is speed measured in?

Answer 10

meters per second

Question 11

What is distance measured in?

Answer 11

meters

Question 12

what is time measured in?

Answer 12

seconds

Question 13

How do you read a distance time graph?

Answer 13

• a stationary object (horizontal line)

- a object moving at a constant speed (straight line sloping upwards)

Question 14

What is 60 mph in m/s?

Answer 14

27 m/s

Question 15

What does the gradient represent in a distance time graph?

Answer 15

the gradient of a distance time graph for an object represents the object’s speed.

Question 16

For an object moving at constant speed, the distance-time graph is a _________ line

Answer 16

Straight

Question 17

The speed of an object is represented by the ___________ of a line

Answer 17

Gradient

Question 18

To find the gradient what must you draw under the line

Answer 18

A tangent

Question 19

The height of the triangle under the line represents the distance travelled, the base represents the _____________

Answer 19

Time taken

Question 20

What can a motion sensor linked to a computer measure?

Answer 20

Velocity

Question 21

What is the gradient of the line equation?

Answer 21

Gradient of the line = the height of the tangent / the base of tangent

Question 22

What does the gradient of a line represent on a velocity time graph?

Answer 22

The acceleration

Question 23

For a moving object with changing speed the distance time graph is not at a ______ line.

Answer 23

Straight

Question 24

What is a horizontal line representing on a velocity time graph?

Answer 24

Zero acceleration

Question 25

What does an upwards gradient on a velocity time graph represent?

Answer 25

Positive acceleration

Question 26

For a an object moving at a constant acceleration on a velocity time graph what rate does it increase at?

Answer 26

Steady

Question 27

What does a negative gradient on a velocity time graph represent?

Answer 27

Negative acceleration (deceleration)

Question 28

What does the gradient represent on a velocity time graph?

Answer 28

Acceleration

Question 29

What is the equation for acceleration?

Answer 29

Acceleration = change of velocity / time taken