A 200-N sled of slides down a frictionless hillside that rises at 37° above the horizontal. What is the nagnitude of the normal force that the surface of the hill exerts on the sled? A) 200 N B) 120 N C) 160 N D) 150 N Final formula:

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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.