- #1
Dan Feerst
- 12
- 0
Homework Statement
A helicopter lifts a 72 kg astronaut 10 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/16. How much work is done on the astronaut 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 (d) speed?
Homework Equations
I have only attempted parts a and b so far, but I can't get a correct answer. I would assume, with a for example that
W=72*10*<9.8/16)*cos(0)=441
I have been trying the same tactic with b. what am I doing wrong?