Difference between normal force and net force?

Question

i have a test tom. and still a little confused.
i have that net force causes acceleration, finding total of vectors. if object moving at constant velocitythen tere's no net force
normal force holds an object to the surface. it always acts perpindicular to surface. Normal for for an object on flat horizantal surface is the weight of that object.

is there anything else i'm missing. Are the things above right?
Thanks

Answer 1

normal force is also a contact force so it has to be touching something. a net force is the total of forces applyign force on an object.

Answer 2

Generally correct, except if there are forces acting on the object in other than a horizontal direction, the normal force must include the sum of the vertical components of those forces as well as the weight of the object.

Answer 3

a classic stress is a perpendicular stress; usually the stress is perpendicular to a floor and pointing into it, in spite of the undeniable fact that it does not could be. in the friction equation F = kN, the traditional stress is N = W cos(theta) the place theta is the incline of the outdoors the place the friction is. W = mg is the burden of the physique m. A internet stress is basically the sum of all forces appearing on a given physique; it is it. In math communicate, we are in a position to write F = SUM(f), the place each and every stress f is a vector so its course is as significant as its cost. For a friction difficulty, we come across that f = ma = w - F = W sin(theta) - kW cos(theta) is the internet stress the place w is the burden stress down the outdoors of a ramp with perspective theta and F is the opposing friction stress appearing up the outdoors of the ramp. And, confident, it has to do with Newt's 2nd. word the f = ma area above.