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Conservation of Linear Momentum

AP Physics 1· difficulty 3/5

A 4 kg4~\text{kg} object at rest explodes into two pieces of equal mass. One moves east at 6 m/s6~\text{m/s}. The other moves

  • A

    East at 3 m/s3~\text{m/s}

  • B

    East at 6 m/s6~\text{m/s}

  • C

    West at 3 m/s3~\text{m/s}

  • D

    West at 6 m/s6~\text{m/s}

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Explanation

Momentum conserved: 0=2(6)+2(v)⇒v=−6 m/s0 = 2(6) + 2(v) \Rightarrow v = -6~\text{m/s} (west).

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