A special electronic sensor is embedded in the seat of a car that takes riders a

Question

A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop at an amusement park. The sensor measures the                magnitude of the normal force that the seat exerts on a rider. The loop-the-loop ride is in the vertical plane and its radius is 24 m. Sitting on the seat before                the ride starts, a rider is level and stationary, and the electronic sensor reads 805 N. At the top of the loop, the rider is upside-down and moving, and the                sensor reads 370 N. What is the speed of the rider at the top of the loop?

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Explanation / Answer

The centrifugal force at the top is Fc=m

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