Question: A roller-coaster car at an amusement park has a mass of 1200 kg when fully loaded with passengers. As the car passes over the top

A roller-coaster car at an amusement park has a mass of 1200 kg when fully loaded with passengers. As the car passes over the top of a circular hill of radius 18 m, assume that its speed is not changing. At the top of the hill, what are the (a) magnitude FN and (b) direction (up or down) of the normal force on the car from the track if the car's speed is v = 11 m/s? What are (c) FN and (d) the direction if v = 14 m/s?

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