Potential Energy

AP Physics 1· difficulty 2/5

A spring stretched 0.10 m0.10~\text{m} stores 2.0 J2.0~\text{J}. To store 8.0 J8.0~\text{J} in the same spring, by how much should it be stretched?

  • A

    0.28 m0.28~\text{m}

  • B

    0.20 m0.20~\text{m}

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  • C

    0.40 m0.40~\text{m}

  • D

    0.80 m0.80~\text{m}

Explanation

Ux2U \propto x^2. UU quadrupling means xx doubles → 0.20 m0.20~\text{m}.

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