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04-28-2008, 01:32 AM
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| College Physics? A helicopter lifts a 80 kg astronaut 11 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 her weight? (c)What is the kinetic energy? (d) What is the speed of the astronaut just before she reaches the helicopter?      |
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