Mention some uses of velocity-time graphs.

(N/A) The velocity-time graphs have the following uses:
$(i)$ To determine the total distance travelled by a particle,which is equal to the area under the velocity-time graph.
$(ii)$ To determine the instantaneous velocity of the particle at any given time $t$.
$(iii)$ To determine the acceleration of the object,which is equal to the slope of the velocity-time graph.