I have this thing, given about 25 watts, it'll provide a force of 10 Lbf (44.5 N) This thing has a mass of ~2.5 pounds. I'll mount it to a couch with a mass of about 200 pounds (with a person on it) What'll happen? If I had a ball that was the same mass, and threw it at the couch, how fast would the ball be traveling to produce the same force? Thanks. If you need any more info just ask.