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A bus starts from rest and accelerates against friction due to road from t= 0 to t=10s. then it is allowed to decelerate from t=11 s to t=30s. comment

about the nature of work done in these different time intervals.


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In the first case The work done is positive as the force favours the motion of the body..

In next case ., it is negative as the force opposes the motion of body..
0 0 0
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