A roller coaster reaches the top of the steepest hill with


A roller coaster reaches the top of the steepest hill with a speed of 6.0 km/h. It then descends the hill, which is at an average angle of 40 degrees and is 35.0 m long. Estimate its speed when it reaches the bottom. Assume co-efficient of kinetic friction = 0.18.

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Physics: A roller coaster reaches the top of the steepest hill with
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