InterviewSolution
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InterviewSolution
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A block of mass 1kg start moving with constant acceleration `a=4m//s_(2)` Find. (a) average power of the net force in time inteval from `t=0` to `t=2s`, (b) instantaneous power of the net force at `t=4 s`. |
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Answer» Correct Answer - A::B::D (a) `P_(av)=W/t =((1)/(2)mv^(2))/t =((1)/(2)m(at)^(2))/t` `=1/2ma^(2) t =1/2 xx 1 xx (4)^(2) (2)` `=16W` (b) `P_(i) =Fv=(ma)(at)` `=mg^(2)t=(1) (4)^(2) (4)` `64W`. |
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