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Asked by 20th March 2013, 2:29 PM
Answered by Expert
Answer:
If we draw the displacement of the boy, it is effectively in a straight line of (20 + 10 +20) m
Since work depends on the displacement not the distance thus the work done by the boy is:
8 x 50 = 400 J
Answered by Expert 22nd March 2013, 9:35 AM
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