Question

Calculate the energy in lifting a mass of 10kg. through a vertical height of 10m?

Answer 1

Answer:

applying potential e=mgh

10×10×9.8=980 J

Answer 2

The energy that we expend is stored as potential energy in the body

Hence the PE will be the energy needed to lift the mass

PE = mgh

PE = 10*9.8*10

PE = 980J

Hence, 980J of energy has been expended by us to lift the mass by 10m

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