A 2-kg object is at rest on a smooth floor with negligible friction. A horizontal force is applied to the object according to the graph below. 20 10 At the end of the 4 m, what is the speed of the object? 5.0 m/s O 3.2 m/s O 6.3 m/s O 4.5 m/s O 5.5 m/s F (N) 0 -10 -20 0 1 2 4 d (m)

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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.