Impulse in an inelastic collision

[TurtleYack]

Homework Statement

2 particles travel towards each other at 10ms^-1. Particle 1 has a mass of 10kg and particle 2 has a mass of 30kg. It is an inelastic collision.

Find the magnitude of the Impulse of particle 1 and 2.

Homework Equations

I=Ft=mv-mu
m₁u₁+m₂u₂=(m₁+m₂)V

The Attempt at a Solution

I'm able to calculate the final velocity of the two particles after the collision when they have joined.
((10×10)+(30×10))/(10+30)=10ms^-1
but I cannot now calculate the impulse of any of the particles.
For example for particle 1:
mv-mu=(10×10)-(10×10)=0

Could anyone help?

 

[mfb]

10m/s is not the final velocity. Keep in mind that they are colliding, their motion is not in the same direction.

Oh, and please don't forget units.