The force which causes acceleration towards the centre of a circle is called Centripetal force but what causes it can vary.
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If the speed is constant, the acceleration is toward the center of the circle.
9 feet in toward the exact center.
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Motion directly either toward or away from the center is 'radial' motion. Motion where the distance from the center is constant is 'tangential' motion.
The road is narrower ahead. The road is narrower ahead. The road is narrower ahead.