A car moves along a straight road

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Kinematics · Kinematics

Problem

A car moves along a straight road. Its velocity decreases uniformly from

18\,\text{m/s}

6\,\text{m/s}

4\,\text{s}

. Which statement correctly describes its acceleration during this interval? (a) Positive acceleration of

3\,\text{m/s}^2

(b) Negative acceleration of

3\,\text{m/s}^2

6\,\text{m/s}^2