In a Type I supernova the main driving factors is the presence and use of two separate stars to create a single supernova explosion, there are other sub-parts of a type I supernova, with the forces among these two process being immense.
One type occurs when two white dwarf stars orbit too close to each other. When the two stars venture to close they both pull on each other with their respective gravitations. The gravitational orbits follow that of nonuniform circular motion in which the are both being pulled inward by the force of the others gravity well, slowly speeding up due to the decrease in orbital radius until collision. Upon collision the force is immense due to the incredibly high masses and acceleration from the both celestial bodies causing a massive explosion.
When a white dwarf and Red-Supergiant star venture to close to each other they begin the same sort of process in which the gravitational forces of one pulls on the other massive body of the other again orbiting a single point due to the gravitational acceleration of the other pulling in a nonuniform circle. The gravitational force of the white dwarf is so strong begins to pull the outer layers and gasses from the Red-Supergiant until it collects to much of fuel and begins essentially a nuclear meltdown until it explodes form the shear amount of energy created by the star. The forces inside the explosion then jettison debris out while also throwing the Red star away from the explosion.