Q.
In the figure shown, blocks $A$ and $C$ start from rest and move to the right with acceleration $a_{A}=12 \,t \,m / s ^{2}$ and $a_{C}=3\, m / s ^{2} .$ Here, $t$ is in seconds. The time (in $s$) when block $B$ again comes to rest is
Laws of Motion
Solution: