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April 23, 2014

Homework Help: physics

Posted by Anonymous on Thursday, October 1, 2009 at 2:30am.

A helicopter lifts a 70 kg astronaut 13 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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