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Friction force

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A 900-kg car initially at rest rolls 50 m down a hill inclined at an angle of 5.0?. A 400-N effective friction force opposes its motion. Part A How fast is the car moving at the bottom? Express your answer to two significant figures and include the appropriate units. Part B What distance will it travel on a similar horizontal surface (assume the friction force is the same) at the bottom of the hill? Express your answer to two significant figures and include the appropriate units. Part C If the friction force remains the same will the distance decrease or increase if the car’s mass is 1800 kg? Part D Determine the new distance. Express your answer to two significant figures and include the appropriate units.

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