A boy climbs up a slide at a speed of 16cms per second and come down at a speed of 45cms per second. Find his average speed
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Answer:
Given, mass of the boy, m=40kg ;
total height gained, h=50×10cm
=500cm=5m
time taken to climb, t=5s
Work done by the boy,
W=mgh=(40)(10)(5)=2000J
Power developed, P=
t
W
=
5
2000
=400W
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