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A loop-the-loop is a track that lies in a vertical circle. A 272 kg roller
coaster car is moving at 29 m/s when it enters the bottom of a loop-
the-loop with a radius of 9.1 m. What is the magnitude of the normal
force acting on the car when it is at the top of the loop-the-loop? Air
resistance and friction are negligible
Enter a positive value in units of N with no decimal.

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