Answer –
(i) Displacement refers to the distance between the body’s original and ultimate positions. In 20 minutes, the cyclist returns to the point where he began. As a result, there is no displacement.
(ii) Average velocity = (net displacement) / (time taken)
(iii) Average speed is given by
Sped avg. = distance travelled / time taken
In this case, from the diagram above, we have upon putting values
= OP + Distance PQ + QO/ 10 minutes
= {1 km + (1/4) x 2 x (22/7) x 1km + 1m}/ (10/60) h
= 6 (2 + 22/14) = 6 (50/14)
Average speed = 21.43 km/h