Physics - Kinematics Question with Solution | TestHub

Building the velocity-time graph from the $a$-$t$ graph: the train speeds up to $4$ m/s in $2$ s, holds speed, and retards to rest. The $v$-$t$ areas are $\frac{1}{2}(2)(4)=4$, $\frac{1}{2}(2)(2)=2$, $(2)(4)=8$ and $\frac{1}{2}(4)(6)=12$, totalling $26$ m. Option B.