Q18 of 28 Page 159

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

Given Data:

Mass= 20kg


Height = 1m


Work is done against gravity so minimum force needed to lift the mass is (20×g), where g is acceleration due to gravity


Work done= force× displacement


=20 (kg) × 10(m/s2)× 1(m)


=200 (J)


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