On a smooth table two particles of mass m each, travelling with a velocity v$_0$

in opposite directions, strike the ends of a rigid massless rod of length l, kept

perpendicular to their velocity. The particles stick to the rod after the collision.Find

the tension in rod during subsequent motion.

I tried to conserve momentum ,

2mv$_0$R = I$\omega$

2mv$_0$R = (2mR$^2$ ) $\omega$

got the angular velocity of combined motion a ($v_0$)/(R)

But how to proceed.