A body is projected up a rough inclined plane from the bott…

Physics Friction Kinetic Friction MCQ (Single Correct)

A body is projected up a rough inclined plane from the bottom with some velocity. It travels up the incline and then returns back. If the time of ascent is t a and time of descent is t d , then

t a = t d

t a > t d

t a < t d

data insufficient

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The correct answer is:

Let velocity of projection be V and velocity of the block when it returns back = V'

Then V > V' (since some K.E. is lost to friction)

Hence average velocity during ascent > average velocity during descent

t a < t d

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