Graphs of Motion question from NEET 2024

Answer: (c)

1. $a$ = slope of the $v$-$t$ graph.
2. At rest at first: $a = 0$. Rising straight line: constant positive $a$. Flat part: $a = 0$.
3. Falling straight line: constant negative $a$. Then $v = 0$: $a = 0$.
4. So $a$-$t$ is zero, a positive block, zero, a negative block. So the answer is (c).