A particle of mass m1 = m moving with velocity 10\(\sqrt3\)m/s ˆ i collides with a particle of mass m_{2 }= 2m at rest. After collision m_{1} comes to rest and m_{2} breaks into two equal parts such that one part has velocity 10 m/s ˆ j then find the angle the velocity vector of other part makes with x-axis in degrees.