A block moves on an inclined surface with an initial speed of 1.6 m/s. After sliding down the incline of distance of L=2 m, the speed of the block is 2.2 m/s. the coefficient of friction between the block and the surface is 0.34. find the angle of the incline

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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.