Force and Motion

Activity Sheet 3

Speed and Acceleration 2

[See 13.4 – sample layout and graph illustrations]

1. This graph shows what happens when a skydiver jumps from an aircraft and spends some time in free fall before opening his parachute.

[see 13.4 - graph height above the ground against time. Letters will be marked as follows (explanation not given)

A, B, C, D, E, F]

Give the letter, eg B, or the range of letters, eg BC, which match the times of the following events. There may be more than one correct answer. The first one is done for you:

The skydiver:
a) jumps out of the aircraft: A
b) is falling at a constant speed:
c) stops falling:
d) is slowing down:
e) speed is increasing (acceleration):
f) his/her parachute opens:

2. These graphs show different objects moving. Describe in words what each one shows. Use words like stop, start, constant speed, accelerating and slowing down.

[See 13.4 for the distance against time graphs]