Move Reletive to object

I am working on a game and have run into a problem.
I need to have a force applied to a object as if it were being sent from another object.
For example an explosion, i want a object to be sent flying by an explosion. I have already tried the track to actuator but that doesn’t work. I cant have the rotation being effected or that will ruin the effect. How would i do this?

The script in that tutorials blend does what you want.

Thanks i think that will work.

Wrong thread. Sorry.