Displacement, Velocity, and Acceleration

AP Physics 1· difficulty 4/5

A ball is dropped from rest. It falls 4.9 m in 1.0 s and 19.6 m in 2.0 s. The instantaneous speed at t=2.0t = 2.0 s is

  • A

    19.619.6 m/s

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  • B

    39.239.2 m/s

  • C

    4.94.9 m/s

  • D

    9.89.8 m/s

Explanation

v=gt=9.82.0=19.6v = gt = 9.8\cdot 2.0 = 19.6 m/s.

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