(b) The graph shows the vertical velocity of the skydiver during the first 40 s of the fall. His parachute is

(b) The graph shows the vertical velocity of the skydiver during the first 40 s of the fall.

His parachute is not open during this time.
Vertical
velocity
0
0
10
30
40
20
Time in s
Explain the shape of the graph.
(4)

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