posted by Kellie .
A particle with an initial linear momentum of 2.28 kg · m/s directed along the positive x-axis collides with a second particle, which has an initial linear momentum of 4.56 kg · m/s, directed along the positive y-axis. The final momentum of the first particle is 3.42 kg · m/s, directed 45.0° above the positive x-axis. Find the final momentum of the second particle.
find the magnitude and direction above the x-axis