Posted by **robert** on Sunday, May 1, 2011 at 8:38pm.

A 300. kg roller coaster car is traveling at a constant speed of 15 m/s over a hill with a radius of curvature of 30. m.

b. What is the normal force acting on the car at the top of the hill?

c. Assume that the car is at the intersection of the radius and the hill and that a frictional force exists between the car and the hill. Draw a force diagram showing all forces.

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