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Power

AP Physics 1· difficulty 2/5

A car traveling at 30 m/s30~\text{m/s} requires 20,000 W20{,}000~\text{W} of engine power to overcome air drag and friction. The total resistive force is

  • A

    30 N30~\text{N}

  • B

    300 N300~\text{N}

  • C

    6000 N6000~\text{N}

  • D

    667 N667~\text{N}

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Explanation

F=P/v=20000/30≈667 NF = P/v = 20000/30 \approx 667~\text{N}.

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