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Elastic and Inelastic Collisions

AP Physics 1· difficulty 2/5

A 2000 kg2000~\text{kg} truck at 10 m/s10~\text{m/s} collides with a 1000 kg1000~\text{kg} car at rest. They stick. Common velocity?

  • A

    3.3 m/s3.3~\text{m/s}

  • B

    10 m/s10~\text{m/s}

  • C

    6.7 m/s6.7~\text{m/s}

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  • D

    5.0 m/s5.0~\text{m/s}

Explanation

v′=(2000⋅10)/3000≈6.67 m/sv' = (2000 \cdot 10)/3000 \approx 6.67~\text{m/s}.

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