Convection cells of magma, circular currents of heating and cooling which increases (cooling) or decreases (heating) density. The Circular motion pulls the plates (away )apart at one point which results with a counter motion of the plates "pushing" into other plates which pushes into another plate so on and so forth.
the force that twists,tears or pushes one part of the crust past another is
The squeezing together of rocks by stress is called compression. In scientific terms Compression is when a force called stress pushes rock/squeezes rock together until it folds or breaks.
the equator squeezes it in and it gets so tight that the ground starts to crack and break. +++ No it doesn't. Compression comes in continental collision.
it is called shear
The force is created by the self weight of the overlying material.
Compression is the force that squeezes rock until it breaks
Tectonic plates are propelled by convection currents in the underlying magma.
The force between nucleons is called nuclear force.
The buoyant force pushes you toward the surface.
There's no force that pushes electrically neutral objects apart, but if the objects in question have a net charge, then the force known as electromagnetism will either push similarly charged objects apart, or pull oppositely charged objects together.