Problem 21:   A block of mass m is initially at rest at the top of an inclined plane, which has a height of 6.7 m and makes an angle of θ = 23° with respect to the horizontal. After it has been released, you perceive it to be traveling at v = 0.85 m/s a distance d after the end of the inclined plane as shown. The coefficient of kinetic friction between the block and the plane is μp = 0.1, and the coefficient of friction on the horizontal surface is μr = 0.2.   )  Find the distance, d, in meters.

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.