Hello, I have merely been brainwashed by the formulas and math of AP Physics. Now, I want to actually understand what I was being taught. I don't really want the answer to my question, but the questions that are in the brackets. 1. What is Kinetic Energy?(I know faster an object, the greater the KE but why? What is KE anyways? Why does it transfer when it collides to another object?) 2. What is pressure?(practically, is there a difference between force and pressure? Ex. that baseball came w/ a lot of force(or pressure). 3. What is potential Energy?(technically, where is it stored inside the atom-if it is in there?) 4. What is spin?(Lets say a ball is falling to the edge of the flat table, 40% of it makes the contact(btw, what would happen if 50% made the contact?), so that 40% starts rebounding, but it can't, b/c it is attached to the other 60% part of the ball, therefore, it starts rolling in the air as it is falling by its axis.(why is it spinning by its axis though? shouldn't it be the 40-60 split point?) Is this what spin really is? 5. What is Friction?(what is the cause of the surface being wielded, why isn't it naturally smooth?) Thx.