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Problem: A roller coaster reaches the top of the steepest hill with a speed of 6.2 km/h. It then descends the hill, which is at an average angle of 40^o and is 60 m long.

Part A: What will its speed be when it reaches the bottom? Assume µk = 0.2.

Please provide clear step by step solution with notes on concepts and equations being used. Thanks.

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