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Billiard ball A is moving...

Billiard ball A is moving along the +x axis with a speed of 2.4m/s when it strikes billiard ball B, initially at rest. As a result of the collision, ball A moves at 1.8m/s at an angle of 25° above the x axis. (a)What is the velocity of ball B after the collision? (b) How much heat is lost in the collision? Each ball has a mass of 0.45kg. Please show work.

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