Calculate the work done by a person in lifting a load of 20 kg from the ground and placing it 1m high on a table.
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Work done = Change in potential energy
= mg (h₂ - h₁)
= 20 kg × 9.8 m/s² × (1 m - 0 m)
= 196 Joule
Work done to lift the load is 196 Joule
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