Question

A boy of mass 55 kg, runs up a flight of 10 stairs,
each measuring 0.1 m, in 10 s. Calculate work
down by the boy. (Take g = 10 ms )​

Answer 1

Answer:

mass = 55 kg

height gain by the boy in 10sec. is1 m..

g is 10 m/s^2..

work done at height is mgh

work done = 55 x 1 x 10 = 550 joules..

hope this will help you..

Answer 2

Answer:

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