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A man is instructed to carry a package from the base camp at B to summit A of a hill of height 1200 m.Weigth of man is 80 kg and weight of packet is 20 kg.(i)How much work does the man do against gravity?What is potential energy of package at point A ?
Asked by SHIVASIS MOHANTY | 19 Mar, 2013, 02:13: PM
answered-by-expert Expert Answer
potential energy of package at point A=20x10x1200=240000J
work done by  the man  against gravity=(80+20)x10x1200=1200000J
work done by  the man on the packet=80x10x1200=960000J
Answered by | 19 Mar, 2013, 04:03: PM

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