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A helicopter lifts a 70 kg astronaut 16 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?
____J

(b) How much work is done on the astronaut by her weight?
_____J

(c)What is the kinetic energy?
_____J

(d) What is the speed of the astronaut just before she reaches the helicopter?
_____m/s

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