Nobody ever teaches me how physics works

[Juliebrenna]

Does it have something to do with inertia? Being that the force of inertia on the object with N -> 20 has more inertia that overpowers the N->10 ? I think you're asking why the opposing force ends up being transferred between the objects. I think it has something to do with inertia.

Physics fail. ASL?

Yes physics fail. I want to know why if I push against an object the force doesn't push back at me, or gets transferred to a power plant in brasil. "because that's how it works" ?

Its all about momentum which is a product of velocity and mass. If you and a 300lb guy are running at each other and <a href="http://eyesonff.com" style="color: rgb(255, 255, 255) ! important; text-decoration: none ! important; cursor: default ! important;">collide</a>, then your going back the other direction - whats so hard to understand