A Ball of Mass 3m at Speed V Approaches a Ball

question 34

Multiple Choice

A ball of mass 3m at speed v approaches a ball of mass 2m at speed -2v and they are about to collide.After the collision,what is the speed of the center of mass?

• A) v
• B) -v/5
• C) v/5
• D) -v
• E) Can't decide because we don't know whether this collision is inelastic or elastic

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