Motion

Question 1

What is speed?

Answer 1

The distance travelled each second

Question 2

What does the gradient of a distance time graph show?

Answer 2

The speed of an object- the steeper the gradient, the greater the speed

Question 3

If an object is stationary what does the line on a distance time graph look like?

Answer 3

The line is horizontal

Question 4

If an object is at a constant speed what does the distance time graph look like?

Answer 4

A straight line which slopes upward

Question 5

What is the speed of an runner who covers 400m in 50s?

Answer 5

8m/s

Question 6

What is velocity?

Answer 6

The speed in a given direction

Question 7

If the velocity of an object changes what do we say happens to the object?

Answer 7

We say it accelerates

Question 8

What is the difference between speed and velocity?

Answer 8

Velocity is speed but in a given direction

Question 9

If an object changes direction but the speed stays the same has the velocity changed?

Answer 9

Yes

Question 10

What is the unit of acceleration?

Answer 10

M/S2

Question 11

What does a velocity-time graph show?

Answer 11

The velocity of an object plotted against time

Question 12

What does the gradient of a velocity-time graph represent?

Answer 12

The acceleration- steeper gradient= greater acceleration

Question 13

If the line on a velocity time is horizontal what is the acceleration, and what does that there fore mean?

Answer 13

The acceleration is zero so the car travels at a constant velocity.

Question 14

How do you find the distance travelled in a given time on a velocity-time graph?

Answer 14

Finding the area underneath the line

Question 15

If the gradient of the line on a velocity- time graph is negative what does that mean about the velocity of the car?

Answer 15

It’s decelerating

Question 16

If you calculate the gradient of the line on a distance time graph what will your answer represent?

Answer 16

The speed of an object

Question 17

If you calculate the gradient of a velocity-time what will you answer represent?

Answer 17

The acceleration

Question 18

If you calculate the area under a line on a velocity-time graph what does your answer represent?

Answer 18

The distance travelled between those times

Question 19

What dies a distance-toile graph show?

Answer 19

Shows the speed of an object plotted against the time taken

Question 20

If the line on a distance time graph is a curve what does that mean about the cars motion?

Answer 20

Accelerating

Question 21

What is acceleration?

Answer 21

The rate of change of velocity in a given time

Question 22

What is the unit of acceleration?

Answer 22

M/S2

Question 23

What does a negative acceleration mean?

Answer 23

The car is decelerating or slowing down

Question 24

A vehicle decelerates from 40 to 10m/s in 10s what is the deceleration of the vehicle?

Answer 24

10-40/10 -3m/s2

Question 25

If you were given a distance time graph how would you calculate the maximum speed the car was travelling at?

Answer 25

Calculate the gradient at the steepest point of the line

Question 26

On a velocity time graph what does a diagonal line straight line show?

Answer 26

Constant acceleration

Question 27

How do you calculate the average speed onn a velocity time graph?

Answer 27

Total distance/ total time

Question 28

What would a velocity time graph look like if the car changes direction?

Answer 28

Negative