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5. A 90-kg block on a 30 slope is pulled up the slope to a vertical height of 200-m above its initial position. a.

5. A 90-kg block on a 30 slope is pulled up the slope to a vertical height of 200-m above its initial position. a. If the pull is on a frictionless surface, what minimum force is necessary to move the block up the slope? b. What is the potential energy at the top?

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