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A roller coaster car is moving at 20 m s along a straight horizontal track...

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A roller coaster car is moving at 20 m s along a straight horizontal track What will its speed be after climbing the 15 m hill shown in the figure if friction is ignored 17 m s 7 m s 5 m s 10 m s 14 m s 1 20 m s ww 15 m

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