# Physics

A billiard ball traveling at 3.00 m/s collides perfectly elastically with an identical billiard ball initially at rest on the level table. The initially moving billiard ball deflects 30.0° from its original direction. What is the speed of the initially stationary billiard ball after the collision?

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1. 1.5

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2. 3sin(30)=1.5

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3. This answer solved by ...mv-mvcos30

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4. 2.59

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