Question: A roller-coaster track is designed so that the car travels upside down on a certain portion of the track as shown in Figure P5.20. What

A roller-coaster track is designed so that the car travels upside down on a certain portion of the track as shown in Figure P5.20. What is the minimum speed the roller coaster can have without falling from the track? Assume the track has a radius of curvature of 30 m.

Figure P5.20

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