(Answered) A roller-coaster car has a mass of 504 kg when fully loaded

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A roller-coaster car has a mass of 504 kg when fully loaded with passengers point A, is the bottom portion of roller coaster has a radius of 10m.

(a) If the vehicle has a speed of 20.2 m/s at point A, what is the force exerted by the track on the car at this point?

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