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A rollercoaster has a speed of 37.5 m/s as it reaches the trough between two big hills. The radius of curvature at the bottom is

A rollercoaster has a speed of 37.5 m/s as it reaches the trough between two big hills. The radius of curvature at the bottom is 115 m. The mass of the rollercoaster car with the riders is 1300 kg. Find the normal force acting on the rollercoaster car and the rider. For full marks, include a system diagram and a force diagram of the situation.

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