The block shown in the figure (Figure 1) has mass mm=8.0 kg and lies on a fixed smooth frictionless plane tilted at an angle θθ=22.0 ∘ to the horizontal. Part A Determine the acceleration of the block as it slides down the plane. Part B If the block starts from rest 14.0 mm up the plane from its base, what will be the block's speed when it reaches the bottom of the incline? Caption: Block on an inclined plane.

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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.