Thanks for fast reply TELLES0808.
I don't want to use impulse. The output is different. Since physics object affected by gravity every tick so i want to reproduce the force upward so my object will not fall. Sorry i forgot to tell that i don't want to use zero gravity either. I want real world physics. Because later I will apply force from different direction too and the object will fall if there is no force upward. I make this post because i failed to do simple physics logic about neutralize vertical force.