A bicycle travels north but slows from to in

PHYSICS · Subjective · AP · Physics 1: Algebra-based · Kinematics · Kinematics

Problem

A bicycle travels north but slows from

8.0\,\text{m}\,\text{s}^{-1}

to

2.0\,\text{m}\,\text{s}^{-1}

in

4.0\,\text{s}

. Indicate the direction of the bicycle’s average acceleration (northward or southward) and briefly justify your answer.

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