A bag of grains of mass 2 kg. is lifted through a height of 5m.
(a) How much work is done by the lift force?
(b) How much work is done by the force of gravity?
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Answer:
(a) work=force(distance)
2(9.8)(5)=98
(b)workdone=gravitational force(height)
gravtational force=mass(9.8)
2(9.8
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