Physics - Kinematics Question with Solution | TestHub

It reaches $8$ m/s in $2$ s (covering $\frac{1}{2}(2)(8)=8$ m), cruises at $8$ m/s for $2$ s ($16$ m), then needs $4$ s to stop (covering $\frac{1}{2}(4)(8)=16$ m). Total = $8+16+16=40$ m.