By landing properly and on soft ground, humans have survived from airplanes when their parachute fails. Without a parachute, a typical human eventually reaches a terminal velocity of about 62m/s. Suppose the fail is from an airplane 1000m high. (a) How fast would a person be falling when he reached the ground if there were no air drag? (b) If a 70 kg person reaches the ground traveling at the terminal velocity of 62 m/s, how much mechanical energy was lost during the fall? What happened to that energy?
By landing properly and on soft ground, humans have survived from airplanes when their parachute fails. Without a parachute, a typical human eventually reaches a terminal velocity of about 62m/s. Suppose the fail is from an airplane 1000m high. (a) How fast would a person be falling when he reached the ground if there were no air drag? (b) If a 70 kg person reaches the ground traveling at the terminal velocity of 62 m/s, how much mechanical energy was lost during the fall? What happened to that energy?
Physics for Scientists and Engineers: Foundations and Connections
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ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter8: Conservation Of Energy
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By landing properly and on soft ground, humans have survived from airplanes when their parachute fails. Without a parachute, a typical human eventually reaches a terminal velocity of about 62m/s. Suppose the fail is from an airplane 1000m high.
(a) How fast would a person be falling when he reached the ground if there were no air drag?
(b) If a 70 kg person reaches the ground traveling at the terminal velocity of 62 m/s, how much mechanical energy was lost during the fall? What happened to that energy?
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