Physics

Problem

A car travels at

10\,\text{m/s}

for

4\,\text{s}

, then accelerates uniformly to

18\,\text{m/s}

over the next

2\,\text{s}

, and finally continues at

18\,\text{m/s}

for another

4\,\text{s}

. What is the total displacement of the car in the entire

10\,\text{s}

journey? a)

148\,\text{m}

140\,\text{m}

120\,\text{m}

132\,\text{m}