Five Billiard Balls Are in Contact and at Rest on a Wire

question 39

Multiple Choice

Five billiard balls are in contact and at rest on a wire that passes through their centers.Two billiard balls are slammed into one end of the row of five at a velocity .If the balls are free to slide but not roll and if the collision is elastic,which of the following is most likely to take place?

• A)One ball at each end goes off with a speed v.
• B)One ball on the side opposite the striking balls goes off with a speed of 2v.
• C)The five balls move off together with a speed of 2v/5.
• D)Two balls on the side opposite the striking balls go off with a speed of v.
• E)None of these will occur.

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