Figure gives an overhead view of the path taken by a 0.1-65 kg cue ball as it bounces from a rail of a pool table. The ball's initial speed is 2.00 m/s, and the angle ?1 is 30.0o. The bounce reverses the y component of the ball's velocity but does not alter the -r component.What are?(a) Angle ?2 and(b) The change in the ball's linear momentum in unit-vector notation?(The fact that the ball rolls is irrelevant to the problem.)

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