Question $2$: For the pulley system as shown,

at this moment the velocity of object $B$ is

known, determine the speed of $A.$Do not use the "virtual work method", it needs to be done using position, velocity, and cable length, not tension.

$($a$)0\mathrm{.}75\frac{m}{s}$

$($b$)1\mathrm{.}5\frac{m}{s}$

$($c$)6\frac{m}{s}$

$($d$)12\frac{m}{s}$