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A billiard ball is shot west at 0.7 m/s. A second, identical ball is shot east...

A billiard ball is shot west at 0.7 m/s. A second, identical ball is shot east at 1.5 m/s. The balls have a glancing collision, which deflects the first ball at 90 deg. and sending it north at 0.2 m/s. What is the speed of the other ball right after the collision?

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