Question

A cyclist moving along a circular track of radius 60 km completes a revolution in 5 minutes. Find his average speed and average velocity.

Answer 1

Dear student,

$$\begin{gathered} dis\tan cetravelled=2\mathrm{\pi r}=2\times 3.14\times 60=376.8\mathrm{km} \\ \mathrm{avg}\mathrm{speed}=\frac{\mathrm{total}\mathrm{distance}}{\mathrm{total}\mathrm{time}}=\frac{376.8}{5}=75.36\mathrm{km}/\min =1256\mathrm{m}/\mathrm{s} \\ \mathrm{avg}\mathrm{velocity}=\frac{\mathrm{displacement}}{\mathrm{time}}=0\mathrm{as}\mathrm{it}\mathrm{returned}\mathrm{to}\mathrm{the}\mathrm{same}\mathrm{point} \\ Regards \end{gathered}$$