Answer :
At the very top and very bottom of the loop, the majority of the acceleration is concentrated in the direction that is oriented toward the center of the circle.
The term "centripetal force" refers to a force that is exerted on a body that is traveling in a circular direction and is directed toward the center around which the body is moving.
The acceleration caused by centripetal force always points in the direction of the circle's center. Because the centripetal acceleration is directed upward at the base of the circle, riders get a sensation of being heavier than their actual weight at this point. Because it points down at the top of the circle, riders are given the impression that they weigh less than they really do.
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