The velocity-time graph shows the motion of a cyclist. Find (i) its acceleration (ii) its velocity and (iii) the distance covered by the cyclist in `15` seconds.
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(i) From the graph , it is clear that velocity is not changing with time i.e., acceleration is zero. (as a = `(dv)/(dt)+dv= 0`) (ii) Again from the graph , we can see that there is no change in the velocity with time so, velocity after 15 s will remain same as `20ms^(-1)` (iii) Distance covered in 15s = `"Velocity" xx "Time"= 20xx15 = 300m [because "Time"=("Distance")/("Speed")]`
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