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Work, Power And Energy
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05/11/2021 4:13 pm
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A weightlifter is lifting weights of mass 200kg up to a height of 2 meters. If g = 9.8 m/s2, calculate:
(a) potential energy acquired by the weight
(b) work done by the weightlifter
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05/11/2021 4:16 pm
Mass, m = 200 kg
Height, h = 2m
Acceleration due to gravity, g = 9.8 m/s2
(a) Potential energy = mgh = 3920 J
(b) Work done against gravity = potential energy gained by the weight
Therefore, work done, W = mgh = 3920 J