A skydiver jumps out of a stationary helicopter and falls straight downwards. During his fall
A skydiver jumps out of a stationary helicopter and falls straight downwards. During his fall
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A skydiver jumps out of a stationary helicopter and falls straight downwards. During his fall:
a) Skydivers move at low Reynolds numbers so he is slowed by the viscous force of drag
b) The kinetic friction of the air on the skydiver does not depend on his speed, so he falls at constant acceleration
c) His weight depends on the normal force with the air so his falling speed is slowed
d) Immediately after he jumps out the drag force is much smaller than his weight, so he accelerates downwards
e) The normal force keeps him from accelerating as he falls
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