A block of mass  m = 2.50 kg  is pushed  d = 2.00 m  along a frictionless horizontal table by a constant applied force of magnitude  F = 17.0 N  directed at an angle  θ = 25.0°  below the horizontal as shown in the figure below. A block labeled m is on a horizontal surface. An arrow labeled vector F points downward and to the right at an angle θ above the horizontal, and acts upon the upper left corner of the block. A faded image of the block is a distance d to the right of the block. (a) Determine the work done by the applied force.  J (b) Determine the work done by the normal force exerted by the table.  J (c) Determine the work done by the force of gravity.  J (d) Determine the work done by the net force on the block.

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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.