Ahelicopter lifts a 66 kg astronaut 15 m vertically from the ocean by means of a cable. the acceleration of the astronaut is g/11. 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?

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car

If jason ii needs 15 kw of power at 300 volts to operate, what amperage of current must flow through the cable?

Which statements best describe energy? check all that apply. the total amount of energy in the universe remains constant. the total amount of energy in the universe changes constantly. energy cannot be converted from one form to another. energy can be converted from one form to another. energy cannot be created or destroyed. energy can be created or destroyed.