A man of mass 75 kg lifts a load to a height of 5 meter the same load is carried by young boy of weight 40 kg to the same height . (i) Firstly, find the ratio of work done by the two. (ii) Secondly, find the potential energy possessed by the young boy if he stands at a height of 50 meter. Plzzz answer my question.........!!
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Answer:
(i) 1.875
(ii) 20,000
Explanation:
I will make it easy for you:
(i) Work done by the man for lifting his own weight = mgh = 75 * 10 * 5 = 3750
Similarly work done by the young boy = 40 * 10 * 5 = 2000
Ratio = man/boy = 1.875
(ii) potential energy of the boy at height 50m = mgh = 40 * 10 * 50 = 20000
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