By now you have gotten somewhat comfortable breaking a vector down into its components.
Fun stuff, right?
Anyway...just when you were getting the math down, we threw in "inclined planes", and the geometry that goes with them. It can be tough to get your head around how the angle at the base of the incline can "work it's way up" to where you are drawing your normal force and gravitational force vectors.
Watch the two videos below to shed some light on how the whole "angles thing" works.
Simple Explanation Detailed Explanation
