A roller-coaster car has a mass of 920 kilogram when fully loaded with passengers. As the car passes over the top of a circular hill of radius 15 meter, its speed is not changing.
(a) Find the magnitude and direction of the force of track on the car at the top of the hill if the car's speed is 11 m/s?
N
(b) Find the magnitude and direction of the force of the track on the car at the top of the hill if the car's speed is 17 m/s?
N