$A$ bus decreases its speed from $80 \, km \, h^{-1}$ to $60 \, km \, h^{-1}$ in $5 \, s$. Find the acceleration (in $m / s^2$) of the bus.

What can you say about the motion of an object whose distance-time graph is a straight line parallel to the time axis?

Under what condition$(s)$ is the magnitude of average velocity of an object equal to its average speed?

$A$ bus starting from rest moves with a uniform acceleration of $0.1\, m s^{-2}$ for $2\, min$. Find $(a)$ the speed acquired,$(b)$ the distance travelled.

During an experiment, a signal from a spaceship reached the ground station in five minutes. What was the distance of the spaceship from the ground station? The signal travels at the speed of light, that is, $3 \times 10^{8} \, m \, s^{-1}$.

What can you say about the motion of an object if its speed-time graph is a straight line parallel to the time axis?