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a helicopter lifts a 72kg astronuat 15m vertically from the ocean by means of a cable. the acceleration of the astronuat is 9/10. how much work is done on the astronuat by; a)the force from the helicopter and b) the gravitational force on her? just before she reaches the helicopter, what are her c) kinetic energy and speed?
8 years ago

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Anonymous
12
8 years ago

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