Hey guys, i'm stuck on this momentum question, i think I have an idea but have no way in proving it. (here is part c to the question) Calculate the total momentum after the collision. Compare this value to the total momentum before the collision. If these values differ, some likely causes of error were? Mass(1)= 0.55kg, Mass(2)=0.55Kg, V1 =(0.79m/s East), V2= (0m/s) V1 prime = (0.366m/s, 51 degrees N of E), and V2 Prime = (0.61m/s, 21 degrees S of E) the prime means the change in velocity after a "collision" i first thought of using (m1v1 + m2v2) =(m1v1(prime) + m2v2(prime)) but the degrees and direction are confusing me, Unless i should use vector addition to add the angles. Any ideas?