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Conservation of Energy

AP Physics 1· difficulty 3/5

A pendulum bob (L=1.0 mL = 1.0~\text{m}) at the bottom of its swing has speed 2.0 m/s2.0~\text{m/s}. Using g≈10 m/s2g \approx 10~\text{m/s}^2, the maximum height it rises is

  • A

    1.0 m1.0~\text{m}

  • B

    0.20 m0.20~\text{m}

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  • C

    0.40 m0.40~\text{m}

  • D

    0.10 m0.10~\text{m}

Explanation

h=v2/(2g)=4/20=0.20 mh = v^2/(2g) = 4/20 = 0.20~\text{m}.

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