physics  really dnt get this at all
posted by ashley  HELP PLEASEE!!! .
A small electric motor is used to lift a
0.50kilogram mass at constant speed. If the
mass is lifted a vertical distance of 1.5 meters in
5.0 seconds, the average power developed by the
motor is

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Sra 
change in potential energy = m g h
energy/time = power = m g h /t
= .50 * 9.81 * 1.5 / 5
Joules/second or Watts 
calculate the power out in watts and horse power of an 80 kg man that climbs a flight of stairs 5.8m high in 4.0s.
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