A weightlifter is lifting weights of mass 200 kg up to a height of 2 meters. If acceleration due to gravity = 9.8 m s⁻²,calculate the work done by the weightlifter
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Why there is - sign in acceleration due to gravity?
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Answer:
Answer = 3920 J
Explanation: Weight ( Mass) = 200 kg
Height ( h) = 2m
Acceleration due to gravity ( g) = 9.8 m s⁻²
Work done = mgh
= 200kg * 9.8m s⁻²* 2m
= 3920 kg ms⁻² m
= 3920 Nm or 3920 J
Hence , The work done by the weightlifter is 3920 J
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