Question

The displacement - time graph is shown in the figure above. What does this graph represent? Find velocity at point A.

Answer 1

The graph represents that displacement is increasing non-uniformly with time. Therefore, the velocity of the body is not constant, it's increasing and the body has an acceleration.

The slope of the graph at any point gives the velocity at that instant.

For example, velocity at A is
$\frac{BC}{DC}=\frac{(8-2)m}{(3-1)s}=\frac{6}{2}=3m{s}^{-1}$