A car of mass $1000\ kg$ is moving with a velocity of $10\ ms^{-1}$. If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of car at the end of $25\ s$ will be:
(a) $25\ ms^{-1}$
(b) $40\ ms^{-1}$
(c) $10\ ms^{-1}$
(d) $250\ ms^{-1}$

Here given, the mass of the car $m=1000\ kg$

Velocity of the car $v=10\ m/s$

If the velocity-time graph for this car is a horizontal line parallel to the time axis, then the velocity of the car at the end of $25\ s$ will be the same as the graph indicates no change in the velocity with respect to the time.

Therefore, the velocity of the car is $10\ m/s$ after $25\ s$.

So, option (c) is correct.