a box (mass = 12 kg ) is going south at 12 m/s. A second box (mass = 18 kg ) is going northwest at 15 m/s. they collide and stick together. what is their common velocity (magnitude and direction ) after the collision

Answer 1

mv1 = <0,-144>
mv2 = <-270/√2, 270/√2>

add the vectors and then change back to direction and magnitude.