KEAM 2021 Physics and Chemistry Solved Paper

If the body starts from rest, i.e. initial velocity u=0.
Since, the body is moving with constant acceleration a.
So,
a=‌

dv

dt

⇒‌‌‌

dv

dt

= constant
⇒‌‌v=0 at t=0
So, the v−t graph will be a straight line passing through the origin.