i really suck at getting momentum to strike uke or another player. i need force to break them and cant get force either PLEASE HELP!

From what I've noticed, play relaxed as much as you can, and play with the momentum... if the person is flying sideways, move with them and add more power into that direction... eventually things should start getting more and more destructive. Another thing you could do would be to use one side of your tori to compliment the momentum on the other side... For example, one leg pushes you into the air towards uke, while the other leg has a kick set up... that will add more power to the kick etc. Goodluck hope this helps.