Serway & Jewett — Motion in Two Dimensions: Problem 34

A ball on the end of a string is whirled around in a horizontal circle of radius \(0.300 \text{ m}\). The plane of the circle is \(1.20 \text{ m}\) above the ground. The string breaks and the ball lands \(2.00 \text{ m}\) (horizontally) away from the point on the ground directly beneath the ball’s location when the string breaks. Find the radial acceleration of the ball during its circular motion.