a body weighing 350N runs up a flight of stairs consisting of 20 steps each 10cm high in 10 second what is his power
2 answers
find the electrical energy extended by an electrical lamp labelled 100w in 8 second
20 steps 0.10 meter high = 2 meters up (pathetic, just a hop and a skip)
m g h = gain in potential energy = 350 N * 2 meters = 700 Joules
power = Joules / seconds = 700 / 10 = 70 watts
energy in Joules = watts * seconds so 800 Joules for your lamp.
m g h = gain in potential energy = 350 N * 2 meters = 700 Joules
power = Joules / seconds = 700 / 10 = 70 watts
energy in Joules = watts * seconds so 800 Joules for your lamp.
11 answers