A positively charged particle having charge `q_1 = 1 C` and mass `m_1 =40 gm` is revolving along a circle of radius `R=40 cm` with velocity `v_1 = 5 m

A positively charged particle having charge `q_1 = 1 C` and mass `m_1 =40 gm` is revolving along a circle of radius `R=40 cm` with velocity `v_1 = 5 ms^-1` in a uniform magnetic field with center of circle at origin `O` of a three-dimensional system. At `t=0`, the particle was at (0, 0.4m, 0) and velocity was directed along positive x direction. Another particle having charge `q_2 = 1 C` and mass `m_2 = 10g` moving uniformly parallel to positive z-direction with velocity `v_2 = 40//pi ms^-1` collides with revolving particle at `t=0` and gets stuck to it. Neglecting gravitational force and coulomb force, calculate x-, y- and z-coordinates of the combined particle at `t= pi//40 s`.