Mr singh of mass 70 kg climbs up a flight of 20 steps each 20 cm high in 1 minute. Calculate 1) the work done by him 2) the energy spent 3) the power developed.
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Answer:1:-2744Joules
2:2744Joules
3:45.73Watt
Explanation:Direction of motion is opposite to the direction of applied force so work done will be negative and energy will be same as that of work done
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