The velocity-time graph (Fig. 8.5) shows the motion of a cyclist. Find

(i) its acceleration


(ii) its velocity and


(iii) the distance covered by the cyclist in 15 seconds.


(i) From the graph, the velocity is constant with repsect to time i.e. the velocity is not changing and thus, rate of change of velocity is zero i.e. acceleration is zero.
(ii) The velocity is same as throughout as the it is constant with time. According to graph, Velocity = 20ms-1


(iii) Distance covered covered by the cyclist in 15 seconds,


S = u × t =20 m/sec x 15 sec = 300 m


17