A cyclist moving on a circular track of rakies `200 m` completely is 5 minutes. What his (a) average speed (b) average velocity in one full revolution?

Explanation

Hence, `r=200 m , t=5 min =5 xx 60 s`
Distaced travelled in one revolution, `S=2 pi r`
Average speed ,`v_(av) =S/t =(2pi r)/t =(2 pi xx 200 )/(5 xx 60) =4.19 ms^(-1)`
Displacement in one revolution, ` vec S= 0`.
:. Average velocity `=vec S/t = 0/(5 xx 60) =0`.