At a given instant, $A$ is moving with velocity of $5\,m / s$ upwards. What is velocity of $B$ at the time
At a given instant, $A$ is moving with velocity of $5\,m / s$ upwards. What is velocity of $B$ at the time
$15\,m / s \downarrow$
$15\,m / s \uparrow$
$5\,m / s \downarrow$
$5\,m / s \uparrow$
At a given instant, $A$ is moving with velocity of $5\,m / s$ upwards. What is velocity of $B$ at the time
From constrained
$-5-5-5+v_B=0$
$v_B=15\,m / s \downarrow$