A cyclist starts from the centre 'O' of a cicular park of radius 1 km, reaches the edge of the park, then cycles along the circumference up to the point Q and returns to the centre along QO as shown in the figure. If the round trip takes 10 min, what is the
(a) Net displacement
(b) average velocity and
(c) average speed of the cyclist.

Explanation

(a) Net displacement = 0
(b) Average velocity = 0
(c) Average speed `=(OP+PQ+OQ)/(t)=(2r+(1)/(4)(2pir))/(t)`
`=(2xx1000+1.571xx1000)/(600)="5.96 ms"^(-1)`