Question

a boy weighing50 kg dimbs up a vertical height of 100 m. Calculate the amount of work
rface of the earth done by How much potential energy does he gain? (= 9.8 ms)
CERT Exemplar​

Answer 1

Answer:

Given,

mass of boy = m = 50 kg

height = h = 100m

since boy does not move anything with his force, work done by him is zero

work done on the boy = gain in potential energy

P.E=mgh

P.E=50×9.8×100

P.E=49KJ

so, potential energy gained by boy is 49 KJ

Explanation:

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