Asingle roller-coaster car is moving with speed on the
Chapter , Problem 48(choose chapter or problem)
Asingle roller-coaster car is moving with speed on the first section of track when it descends a 5.0-m-deep valley, then climbs to the top of a hill that is above the first section of track. Assume any effects of friction or of air resistance are negligible. (a) What is the minimum speed required if the car is to travel beyond the top of the hill? (b) Can we affect this speed by changing the depth of the valley to make the coaster pick up more speed at the bottom? Explain.
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