Elastic and Inelastic Collisions

AP Physics 1· difficulty 2/5

A 2 kg2~\text{kg} cart at 4 m/s4~\text{m/s} undergoes a 1-D <strong>elastic</strong> collision with another 2 kg2~\text{kg} cart at rest. Final velocities?

  • A

    Cart 1 at 00, cart 2 at 4 m/s4~\text{m/s}

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  • B

    Both at 2 m/s2~\text{m/s}

  • C

    Cart 1 reverses, cart 2 at 4 m/s4~\text{m/s}

  • D

    Cart 1 at 4 m/s4~\text{m/s}, cart 2 at 00

Explanation

For equal masses, the moving cart stops and the target takes its velocity (classic billiard result).

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