Q22 (a) A person trying to lose weight (dieter) lifts a 10 kg mass, one thousand times, to a height of 0.5 m each time. Assume that the potential energy lost each time she lowers the mass is dissipated. How much work does she do against the gravitational force?
The work done against the gravitational force is given by :
= Number of times the weight is lifted work done in 1 time.
or
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