How much energy is gained by a box of mass 20kg when a man(g=10ms−2) Raises the box by 0.5m in order to place it inside the bus ?
200J
10J
100J
0J
A
0J
B
10J
C
200J
D
100J
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Solution
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W=F×S F=m×g=20×10=200N W=200×0.5=100J Hence work done by the bus is 100J.
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