Gey who weighs 500 newtons is late for class. it takes her 7.5 seconds to run up two flights of stairs, a total of 8 meters. how much power does gerry expend inher run upstairs?

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 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Avoltaic cell converts chemical energy to

How to calculate voltage drop in a series circuit