Meriam, Kraige & Bolton — Kinetics of Particles: Problem 3_213

3/213 Repeat the previous problem, only now the mass of puck $B$ is twice that of puck $A$. [Context from Problem 3/212]: Two identical hockey pucks moving with initial velocities $v_A$ and $v_B$ collide as shown. If the coefficient of restitution is $e = 0.75$, determine the velocity (magnitude and direction $\theta$ with respect to the positive $x$-axis) of each puck just after impact. Also calculate the percentage loss $n$ of system kinetic energy. Initial values from diagram 3/212: $v_A = 10 \text{ m/s}$ at $30^\circ$ to the $x$-axis. $v_B = 6 \text{ m/s}$ in the negative $x$-direction. The $x$-axis is the line of impact (connecting the centers of the pucks).