Question

The figure shows the displacement-time graph of a body moving in a straight line. Which of the following shows the corresponding velocity-time graph?

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

It follows from the figure, displacement increases linearly with time till $t=5s$. Therefore, velocity is a positive constant from $t=0s$ to $t=5s$.
From $t=5s$ to $t=15s$, displacement remains constant. Therefore, velocity is zero during this interval.
From $t=15s$ to $t=20s$, displacement decreases linearly with time. Therefore, the velocity is constant but negative in this time interval.