A 6.89-kg particle is subject to a net force that varies with position as shown in the figure. The particle starts from rest at x = 0. F, (N) 3 2 1 x (m) 4 6 8 10 12 14 16 2 What is its speed at the following positions? (a) x = 5.00 m m/s (b) x = 10.0 m m/s (c) x = 15.0 m m/s

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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.