InterviewSolution
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InterviewSolution
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Starting from rest a body slides down a `45^(@)` inclined plane in twice the time it takes to slide down the same distance in the absence of friction. The coefficient of the body and the inclined plane is :A. 0.2B. 0.25C. 0.75D. 0.5 |
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Answer» Correct Answer - C ( c) `s=(1)/(2)at^(2) " or " t=sqrt((2s)/(a)) " or " t prop (1)/(sqrt(a))` `(t_(1))/(t_(2))=sqrt((a_(2))/(a_(1)))` or `" " 2=sqrt((g sin theta)/(g sin theta-mug cos theta))=sqrt((1)/(1-mu))` as`" " sin 45^(@)=cos 45^(@)` `therefore" " 1- mu =(1)/(4) implies mu=0.75` |
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