Physics

Problem

In which of the following situations will a traveller’s average speed be equal to the magnitude of the average velocity? a) A person walks

50\,\text{m}

east and then

90\,\text{m}

north in

4\,\text{min}

b) A girl walks straight

200\,\text{m}

north in

4\,\text{min}

c) A car completes one full round of a

400\,\text{m}

circular track in

4\,\text{min}

d) A boy walks

100\,\text{m}

east and then

100\,\text{m}

west in

4\,\text{min}