Pre-Purchase Physics Question...

Hi guys, just had a quick question regarding physics...I'm assuming this is possible, but I need to be sure. I'm looking to just make a simple FPS, just for fun. One of the things I would like to be able to do is when a projectile collides with a player character (or maybe even other objects), that character or object is thrown back, depending on the force applied by the projectile. Can anyone confirm this is possible?

Thanks guys, sorry for the stupid question =)