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

question 74

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.What is the change in kinetic energy of the system as a result of the collision?

• A)0
• B)some positive value
• C)some negative value
• D)No answer above is correct.

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