the final speed is lower than the starting speed,

The acceleration is negative.

how the distance changes ‘with time.

shows how speed changes.

Terminal velocity mean

The slope of a speed-time graph tells you the .......................

If the line is ..................... the speed is not changing.

A hockey ball accelerates from 0 m/s to 25 m/s in 0.05 seconds. What is the acceleration of the ball?

A football decelerates from 10 m/s to 0 m/s in 0.1 seconds.

What is the acceleration of the ball?

A football decelerates from 10 m/s to 0 m/s in 0.1 seconds.

What is the deceleration of the ball?

A car’s speed changes from 6 m/s to 18 m/s

in 2 second.

True of False

The acceleration is 12 m/s².

A car’s speed changes from 6 m/s to 18 m/s

in 2 second.

True of False

The deceleration is 6 m/s².

A car’s speed changes from 6 m/s to 18 m/s

in 2 second.

True of False

The acceleration is —6 m/s².

A car’s speed changes from 6 m/s to 18 m/s

in 2 second.

True of False

The acceleration is 6 m/s².

Look at the speed—time graphs below.

In which diagram or diagrams is the car.

travelling at a constant speed?

Look at the speed—time graphs below.

In which diagram or diagrams is the car.

accelerating?

Look at the speed—time graphs below.

In which diagram or diagrams is the car.

decelerating?

0 and A

A and B

B and C

C and D

Calculate the acceleration of the bus between points D and E.

Calculate the acceleration of the bus between points B and C.

Calculate the deceleration of the bus between points B and C.