A boy lifts a mass 5 kg to a height of 150 cm. what is the work done by boy?
=IS IT 750 joule
Answers
Answered by
8
Explanation:
work is equal to force into displacement 5 into 150= 750 joules
Answered by
34
As you know,
Work = force × displacement
Here, boy has to lift a mass of 5 kg upwards with a force which is equal to its weight (mg )
F = mg = 5 Kg × 10 m/s^2 = 50 N
But, he displaces it to height of 150 cm = 1.5 m
Hence , W = 50 N × 1.5 m
= 75 Joule
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