Physics

Problem

A car starts from rest at a traffic light, accelerates at

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

for

4.0\,\text{s}

, and then continues at constant velocity for an additional

5.0\,\text{s}

. What is the car’s total displacement from the light after the

9.0\,\text{s}

interval? a)

108\,\text{m}

84\,\text{m}

60\,\text{m}

72\,\text{m}