Motion

Question 1

Speed

Answer 1

Distance moved ÷ time taken

Question 2

Velocity

Answer 2

Speed in a given direction (m/s)

Question 3

Acceleration

Answer 3

Change of velocity per second (m/s^2)

Question 4

Deceleration

Answer 4

Change of velocity per second when an object slows down

Question 5

v=d/t

Answer 5

speed (m/s) = distance travelled (m) ÷ time taken (s)

Question 6

a=∆/t (a=v-u/t)

Answer 6

acceleration (m/s^2) = change in velocity (m/s) ÷ time taken (s)

Question 7

How can we tell from a distance-time graph if an object is stationary?

Answer 7

There is a horizontal line

Question 8

How can we tell from a distance time graph if an object is moving at a constant speed?

Answer 8

There is a straight line that slopes upwards

Question 9

What does the gradient of a distance time graph tell us?

Answer 9

The object’s speed

Question 10

What is the different between speed and velocity?

Answer 10

Velocity is speed in a given direction

Question 11

What can we say if a velocity-time graph is a horizontal line?

Answer 11

The acceleration is zero

Question 12

How can we tell from a velocity-time graph if an object is accelerating or decelerating?

Answer 12

The gradient of the line represents the acceleration

Question 13

What does the area under a velocity-time graph show?

Answer 13

The distance travelled

Question 14

How can we calculate speed from a distance-time graph?

Answer 14

The speed of an object is given by the gradient

Question 15

How can we calculate acceleration from a velocity time graph

Answer 15

The acceleration of an object is given by the gradient

Question 16

How can we calculate distance from a velocity-time graph?

Answer 16

The distance is the area under the line of the graph