What Is The Opposite Of A Newton Physics Question Urgent Help Needed 10 Points For Best Answer?

Physics question urgent help needed 10 points for best answer? - what is the opposite of a newton

In the Newton's third law then says that if abject exerts a force on B, B is also a force of equal size and strength in the opposite direction.
also in Newton's third law states that this law R 2 contain different places.

Now my question is what happens when 2 different agencies is a strength, is as if I push my body against the tree and then my body hanging on the tree .. Forces will go in the opposite direction, but how do I force DONOT CANCELD (s like r forces equal in size), leading to the acceleration. Tell me how the various forces in two places can not disappear, for no other reason?
and also tell me how the effects of inertia d'accélération something? (This is another case) is, in fact, what iz that all forcesInstead of this Act thses third and the forces that are in various organs 2 ... But I do not want iz 2 y esto?

plz tell me step by step
Comments plz help Rud No No!
Thanks in advance