a weight lifter is holding a weight of 120 kg on his shoulder for 30sec .what is the work done
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The weight lifter is hold 120 kg mass on his shoulder for 30 seconds but there is no displacement of the weight.
Force applied = 120 × 9.8 = 1176 N
Displacement = 0 m
By formula:
Work done = Force × displacement
Work done = 1176 × 0
Work done = 0 Joules
Hence, the work done by the weight lifter in holding the weight for 30 seconds is ZERO.
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