A car moves along a straight road in two stages

PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A car moves along a straight road in two stages. In the first stage it covers

24\,\text{km}

30\,\text{min}

. In the second stage it travels another

18\,\text{km}

20\,\text{min}

. (i) Calculate the average speed for the complete journey, expressing your answer in

\text{km h}^{-1}

. (ii) Convert the value obtained in part (i) to

\text{m s}^{-1}

, correct to two decimal places.