A billiard ball moving at 5.00 m/s strikes a stationary ball of the same mass. After the collision, the first ball moves at 4.33 m/s at an angle of 30.0degrees with respect to the original line of motion. Assuming an elastic collision, find the struck ball's velocity and direction after the collision.
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Expert's answer
2020-11-30T14:59:20-0500
All Balls are identical so have same mass M.
Pxi=5MPxf=4.33cos30°M+VsinθM
Applying conservation of linear momentum along original line of motion.
Vcosθ=5−4.33×23......Eq[1]
Applying conservation of linear momentum along perpendicular direction.
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