Physics - Kinematics Question with Solution | TestHub

A block $B$ is suspended from a cable that is attached to the block at $E$, wraps around three pulleys and is tied to the back of a truck $D$. If the truck starts from rest when $x_D$ is zero and moves forward with a constant acceleration of $a_p=\frac{3}{2}$ $m/s^2$, the speed of the block at the instant $x_D=3$ m is: