A coin is placed on an a rough horizontal surface. The surface is gradually inclined, and it is found that the coin starts to slide down with an approximately constant velocity at theta = 23. Estimate the coefficient of kinetic friction between the coin and the surface. 0.42 0.92 3.3 N 0.39

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”