9. An amusement park ride features a passenger compartment of mass 400 kg that is released from rest at point A and moves along a track to point D, as shown. The compartment is in free fall between points A and B, then moves along the circular are between points B and C, and decelerates to a stop at D because of uniform friction between points C and D. Assume the track is frictionless from point A to point C. g = 9.8m/(s^2). Determine , a. the speed of the compartment at point B b. the speed of the compartment at point C. the coefficient of kinetic friction between the compartment and the horizontal track between points C and D www.pandD 5.0 m 5.0 m 3 15 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.