There are two inclined surfaces of equal length (L)
and same angle of inclination 45o with the
horizontal. One of them is rough and the other is
perfectly smooth A given body takes 2 times as much time to slide down on rough surface than on
the smooth surface. The coefficient of kinetic
friction (μk) between the object and the rough
surface is close to
0.25
0.40
0.5
0.75
Consider a water tank shown in the figure. It has onewall at x = L and can be ta
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