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A helicopter lifts a 72 kg astronaut 15 m vertically from

A helicopter lifts a 72 kg astronaut 15 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/10.

a. How much work is done on the astronaut by the force from the helicopter?

b. How much work is done on the astronaut by the gravitational force on her?

c. What is the kinetic energy of the astronaut just before she reaches the helicopter?

d. What is the speed of the astronaut just before she reaches the helicopter?

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