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4. A car on a roller coaster has a speed of 12 nv's at an elevation of 29 an above the ground. It coasts down

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4. A car on a roller coaster has a speed of 12 nv's at an elevation of 29 an above the ground. It coasts down a slope. and then comes to rest after climbing a hill. Find the height h of the hill. [Hint: Use conservation of mechanical energy] Ans: 2?.3 m

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