What does the path of an object look like when it is in uniform motion?

$A$ ball is gently dropped from a height of $20 \, m$. If its velocity increases uniformly at the rate of $10 \, m s^{-2}$,with what velocity will it strike the ground? After what time will it strike the ground?

The figure shows the distance-time graph of three objects $A$,$B$,and $C$. Study the graph and answer the following questions:
$(a)$ Which of the three is travelling the fastest?
$(b)$ Are all three ever at the same point on the road?
$(c)$ How far has $C$ travelled when $B$ passes $A$?
$(d)$ How far has $B$ travelled by the time it passes $C$?

$A$ motorboat starting from rest on a lake accelerates in a straight line at a constant rate of $3.0 \, m s^{-2}$ for $8.0 \, s$. How far does the boat travel (in $m$) during this time?

$A$ train starting from a railway station and moving with uniform acceleration attains a speed $40 \, km \, h^{-1}$ in $10$ minutes. Find its acceleration (in $m / s^{2}$).

What is the nature of the distance-time graphs for uniform and non-uniform motion of an object?