Two Billiard Balls Undergo a Glancing Collision

question 72

Multiple Choice

Two billiard balls undergo a glancing collision.Before the collision the first ball was travelling east at 2.6 m/s and the second ball was travelling west at 1.2 m/s.If the second ball is deflected by +90 degrees travelling north at 1.47 m/s,what is the speed of the first ball after the collision?

• A)1.39 m/s
• B)1.68 m/s
• C)2.57 m/s
• D)2.03 m/s

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