Facts I need to learn in Physics besides the formula

[physics_help]

Homework Statement

I would want to know how free fall, acceleration and friction works ?
I mean it like there is a greater friction when an object is heavier
or an object is possible to have zero velocity but nonzero accelaration.
I need those kinds of things to study :D

Homework Equations

If there is like the derivation of the formulas :D

The Attempt at a Solution

Actually this question is really in general and i would want to learn more about physics, its effect and the applications. Please help me :D tnx in advance guys

 

[SHISHKABOB]

if it isn't possible for you to take classes on this stuff and you don't have the ability to go out and buy yourself an introductory physics textbook, I would suggest going to khanacademy.org for a great, free online source of learning material related to physics, and a whole lot more