Calculate the work done by a student in lifting 0.5kg book from the ground and keeping it on a shelf 1.5m high.
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3
work done = mgh = 0.5 × 1.5 × 10= 0.75J
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8
Work done = Change in potential energy
= mg (h₂ - h₁)
= 0.5 kg × 9.8 m/s² × (1.5 m - 0 m)
= 7.35 Joule
Work done to lift the load is 7.35 Joule
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