Displacement, Velocity, and Acceleration

AP Physics 1· difficulty 1/5

An object is released from rest. After 2.0 s2.0~\text{s}, what is its speed (g10 m/s2g \approx 10~\text{m/s}^2, ignore air resistance)?

  • A

    20 m/s20~\text{m/s}

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  • B

    40 m/s40~\text{m/s}

  • C

    10 m/s10~\text{m/s}

  • D

    5 m/s5~\text{m/s}

Explanation

v=gt=(10)(2.0)=20 m/sv = g t = (10)(2.0) = 20~\text{m/s}, directed downward.

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