A car travels east in and then immediately returns west along the same straight road…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A car travels

100\,\text{m}

east in

10\,\text{s}

and then immediately returns

100\,\text{m}

west along the same straight road in the next

10\,\text{s}

. Which statement about its motion during the entire

20\,\text{s}

interval is correct? (a) Both the average speed and the average velocity are

0\,\text{m/s}

. (b) Both the average speed and the average velocity are

10\,\text{m/s}

. (c) The average speed is

10\,\text{m/s}

and the average velocity is

0\,\text{m/s}

. (d) The average speed is

20\,\text{m/s}

and the average velocity is

0\,\text{m/s}