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Q. A 55-kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between the skis and the snow is 0.17. What would be the magnitude of the acceleration?

Q. A lead ball is dropped into a lake from a diving board 30 m above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 10 s after it is released.

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