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