two particles of masses m1 and m2 move at speeds u1, u2 respectively collide and fuse. If α is the angle between the two directions of motion before the collision, find an expression for the new mass m, in terms of m1 m2 u1 u2 and α
Etot2 = p2c2+m2c4
The Attempt at a Solution
(m12 u12 c2 + m1 2 c4)1/2 + (m22 u22 c2 + m22 c4)1/2 = mc2
However this does not take into consideration the angle α, so I am unsure as to where this comes in.