A roller coaster car moves in a vertical circle of radius R. At the top of the circle the car has speed v1, and at the bottom of the circle it has speed v2, where v2>v1. Suppose that v2 is in the x-direction, and y-axis is directed upward.
1) When the car is at the top of its circular path, what is the direction of its radial acceleration, arad, top? The direction angle Ī²-top of the radial acceleration arad, top is measured from the +x-direction toward the +y-direction.
2) When the car is at the bottom of its circular path, what is the direction of its radial acceleration, arad, bottom? The direction angle Ī²-bottom of the radial acceleration arad, bottom is measured from the +x-direction toward the +y-direction.
3) In terms of v1 and v2, what is the ratio arad, bottom/arad, top?
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