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Representing Motion

AP Physics 1· difficulty 2/5

0 3 6 0 12 t (s) v (m/s)

The velocity decreases uniformly from 12 m/s12~\text{m/s} at t=0t=0 to 00 at t=6 st = 6~\text{s}. What is the acceleration?

  • A

    −2.0 m/s2-2.0~\text{m/s}^2

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  • B

    −6.0 m/s2-6.0~\text{m/s}^2

  • C

    −12 m/s2-12~\text{m/s}^2

  • D

    −0.5 m/s2-0.5~\text{m/s}^2

Explanation

Slope of vv-vs-tt: a=(0−12)/(6−0)=−2.0 m/s2a = (0 - 12)/(6 - 0) = -2.0~\text{m/s}^2.

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