A labourer whose own mass is 50kg, carries a load of another 60kg on his head to the top of a building 15 m high. Find the work done by him. (Take g = 10 m/s2)
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work done = mass carried X displacement X gravity=60 X 15 X10=9000 Joules
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Answer:
total mass = 50 +60 =110 kg
s=15
work done =0
because force and displacement are perpendicular to each other.
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