mr singh of mass 70 kg climbs up a flight of 20 steps each 20 cm high in 1 minute. calculate i.the work done by him ii.the energy spent iii. the power developed.
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A) Let
M=70kg
20 steps
N=F 1 STEPS =20CM
HEIGHT OF 10 STEPS =
20*20
= 400
= 4CM
G =10
M =70
MGH
70*10*4
ANSWER IS 2800
B)2800j energy spent
C) p=w/t
2800/60
46.67
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