A 90 kg skydiver has just barely jumped from an airplane. Calculate how much of each kind of energy he has.
1. how much potential energy does he have if the plane was 3875 m above the ground?
Ug =?

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

Avalue that describes how heavy an object is and is related to the force of gravity is

When you turn on a battery-operated device, an electrical circuit is