Two 5000-Kg Rail Cars Roll Without Friction (One at 1

question 31

Multiple Choice

Two 5000-kg rail cars roll without friction (one at 1 m/s, the other at 2 m/s) toward each other on a level track. They collide, couple, and roll together with a combined momentum of

• A)zero.
• B)5000 kg m/s.
• C)10,000 kg m/s.
• D)15,000 kg m/s.

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