InterviewSolution
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InterviewSolution
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The upper half of an inclined plane with inclination `phi` is perfectly smooth while the lower half is rough. A body starting from rest at the top will again come to rest at the bottom if the coefficient of friction for the lower half is given byA. `mu=2 tan theta`B. `mu= tan theta`C. `mu=(2)/(tan theta)`D. `mu=(1)/(tan theta)` |
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Answer» Correct Answer - A (a) `v^(2)=2a_(1)s(a_(1)=g sin theta)` `0=v^(2)-2a_(2)s(a^(2)=mu g cos theta-g sin theta)` From these two equations we see that `a_(1)=a_(2)` `implies" " g sin theta=mu g cos theta-g sin theta implies 2 tan theta =mu` |
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