Meriam, Kraige & Bolton — Plane Kinetics of Rigid Bodies: Problem 6_150

6/150 The body composed of slender rods of weight $w$ per unit length is lying motionless on the smooth horizontal surface when a linear impulse $\int P \, dt$ is applied as shown. Determine the velocity $v_B$ of corner $B$ immediately following the application of the impulse if $l = 20 \text{ in.}$, $w = 2.5 \text{ lb/ft}$, and $\int P \, dt = 2 \text{ lb-sec}$.