The 0.16 kg particle has a speed v = 11.9m / s as it passes the position shown. The coefficient of kinetic friction between the particle and the vertical plane track is mu*k = 0.24 Determine the magnitude of the total force exerted by the track on the particle What is the change in speed v (positive if speeds up, negative is slows down) of the particle?

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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.