Transfer motion between two objects?

hey all,

I am very new to Flash and AS3 so please bare with me if I ask some newb questions.

I have to marbles (balls) lets call them m1 and m2, I am trying to have m1 move across the stage and hit m2, then have m1 stop and m2 continue moving off the screen at the same rate as m1.

I am able to get m1 to move over (left to right) and hit m2 and stop using hitTestObject, but I can’t figure out how to get m2 to move to the right.

It seems so easy but I can’t figure it out, any ideas?

Thank you

little picture for help: m1--------->m1|m2----------->|bye bye