A Billiard Ball Is Moving in the X-Direction at 33

question 9

Multiple Choice

A billiard ball is moving in the x-direction at 33.4 cm/s and strikes another billiard ball moving in the y-direction at 38.9 cm/s.As a result of the collision,the first ball moves at 50.6 cm/s,and the second ball stops.In what final direction does the first ball move?

• A)in the x-direction
• B)at an angle of 49.4° ccw from the x-direction
• C)at an angle of 40.6° ccw from the x-direction
• D)at an angle of 56.6° ccw from the x-direction
• E)Such a collision cannot happen.

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