please explain the reason of this question with its answer
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Work done = W = ∫P•dt ( where P = power and t = time)
=> W = Area under P-t curve
so, ..... as t increases .... area under P-t curve increases ..... (in this curve)
Hence , Work done by force increases ......
Ans is (C) Always increases .....
Note:- Work done decreases only if p goes to negative side (bcoz area of the negative side of curve will be subtracted from the area of positive side )..... otherwise, work done always increases
=> W = Area under P-t curve
so, ..... as t increases .... area under P-t curve increases ..... (in this curve)
Hence , Work done by force increases ......
Ans is (C) Always increases .....
Note:- Work done decreases only if p goes to negative side (bcoz area of the negative side of curve will be subtracted from the area of positive side )..... otherwise, work done always increases
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