A sled is tied to a tree on a frictionless, snow-covered hill, as shown in the second figure in the right. If the sled weighs 80 N, find the a) force exerted by the rope on the sled; and the b) normal force exerted by the hill on the sled.

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Q: Suppose that during the launch of a rocket from the surface of the Earth, an astronaut onboard the…

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Q: 45°

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!