Question

imagine a skateboarder traveling down a direct inclined ramp (no curves). describe the normal force in this situation

Answer 1

Do u know the weight of ur skateboard

Answer 2

The normal force due to an inclined surface is always \[\huge F_N= mg \cos(\theta)\]The proof for this includes the use of geometry and similar triangles. I would recommend visiting here http://www.physicsclassroom.com/class/vectors/Lesson-3/Inclined-Planes for it. If you prefer a video, I would recommend watching this https://www.khanacademy.org/science/physics/forces-newtons-laws/inclined-planes-friction/v/inclined-plane-force-components