Circular Motion

AP Physics 1· difficulty 2/5

A car of mass 1200 kg1200~\text{kg} rounds a horizontal curve of radius 40 m40~\text{m} at 10 m/s10~\text{m/s}. What centripetal force does friction provide?

  • A

    12,000 N12{,}000~\text{N}

  • B

    1500 N1500~\text{N}

  • C

    3000 N3000~\text{N}

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  • D

    300 N300~\text{N}

Explanation

Fc=mv2/r=(1200)(100)/40=3000 NF_c = m v^2/r = (1200)(100)/40 = 3000~\text{N}.

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