A Billiard Ball Is Moving in the X-Direction at 30 $\degree$

question 21

Multiple Choice

A billiard ball is moving in the x-direction at 30.0 cm/s and strikes another billiard ball moving in the y-direction at 40.0 cm/s.As a result of the collision,the first ball moves at 50.0 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 53.1 \(\degree\) ccw from the x-direction
• C)at an angle of 45.0 \(\degree\) ccw from the x-direction
• D)Such a collision cannot happen.

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