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MIT 8.01 Physics I Classical Mechanics, Fall 1999 7 Online
OpenStudy (anonymous):

just have a question regarding conservartion of momentum and circular motion a/An incident billiard ball (Ball 1) is rolling on a frictionless tale with a known inital velocity of v1i. It collides off-center with an identical ball (Ball 2) that is connected with a perfectly weightless string of known length r pinned horizontally at point A. After the collision the final velocity of Ball1 is known to be v1f at an angle of α above the x-axis. Will the balls collide again?

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