2. A parachutist jumps from a height of 3.10x10° m and falls freely for 10.0s. He then opens his parachute and for the next 20.0 s slows down with an average acceleration of 4.50 m/s². After that he falls the rest of the distance to the ground at a uniform velocity. a. What is his velocity just before the parachute opens? b. At what altitude does the parachute open? c. What is his velocity just before he hits the ground?
2. A parachutist jumps from a height of 3.10x10° m and falls freely for 10.0s. He then opens his parachute and for the next 20.0 s slows down with an average acceleration of 4.50 m/s². After that he falls the rest of the distance to the ground at a uniform velocity. a. What is his velocity just before the parachute opens? b. At what altitude does the parachute open? c. What is his velocity just before he hits the ground?
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Transcribed Image Text:2. A parachutist jumps from a height of 3.10x10° m and falls freely for 10.0s.
He then opens his parachute and for the next 20.0 s slows down with an
average acceleration of 4.50 m/s². After that he falls the rest of the distance
to the ground at a uniform velocity.
a. What is his velocity just before the parachute opens?
b. At what altitude does the parachute open?
c. What is his velocity just before he hits the ground?
d. Calculate the time required for the whole descent.
e. From what height would he have to fall freely in order to strike the
ground with the same velocity as he does when wearing a parachute?
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