Problem 8-75 Inelastic collision

Two trucks have a completely inelastic collision. After the collision, they have a common velocity of \(11 \;m/s\) at \(35^\circ\) south of west. Before the collision, one truck \((\text{mass} \; 2.3\times10^4\; kg)\) has a velocity of \(15\; m/s\) at \(51^\circ\) south of west. Determine the initial velocity (magnitude and direction) of the other truck \((\text{mass} \; 1.2\times10^4\; kg).\)

A "completely inelastic collision" means:

(A)   The objects bounce off each other and energy is conserved.

(B)   The objects join together and proceed as one object with combined mass and loss of energy.