2006-10-30 10:03:35 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
On earth, weight is defined as mass * the gravitatinal constant. Ex: kg*9.8, slug*32.2, gram*980. Weight always acts toward the center of the earth.
Normal force is simply any force perpendicular (another word for NORMAL) to a surface under consideration. An object laying on a level floor applies a normal force on the floor equal to its weight. If you tip the floor to an angle, the object will have a normal force on the floor of its weight * cos8 (8=theta) and a tangential friction force of w * sin8. These 2 forces will add vectorially to a value equal to the weight.
2006-10-30 10:19:36 · answer #1 · answered by Steve 7 · 0⤊ 0⤋
Weight = the force of gravity pulling toward the center of the earth. A Normal Force is the force perpendicular to the surface. Think of gluing a 1kg. mass onto a board. If the board is horizontal the 1 kg. mass will push (or pull) down with a force of 2.2 lbs. But, if the board were stood up to vertical the weight would still weigh 2.2 lbs. - but wouldn't be pushing into or away from the board at all. There would be no force Normal to the surface.
2006-10-30 10:12:27 · answer #2 · answered by Richard S 6 · 1⤊ 0⤋
weight acts down, normal force acts normal to some surface (at right angles to the plane).
If you have a massy object on an inclined plane the weight will be mass*gravity downwards and (if the object is not sliding) this will be exactly balanced by a normal force, normal to the inclined plane and a frictional force acting in the direction of the plane (also in the same plane as g and the normal force).
2006-10-30 10:15:34 · answer #3 · answered by Anonymous · 0⤊ 0⤋
normal force will be different if the object is accelerating in the y direction (up or down). Otherwise is does equal the weight. The normal force is what you "feel" as weight.
2006-10-30 10:05:24 · answer #4 · answered by Alex S 2 · 0⤊ 0⤋
Coifficient of friction is the ratio of the stress that maintains touch between an merchandise and a floor and the frictional stress that resists the action of the object. the formulation connecting them is; ? = F /N, the place F is the frictional stress and N is the traditional stress exrexted on the exterior via the object. its good to notice that ? (mue) usually has no contraptions. * F= ? x mass of excellent x g. good luck bro.
2016-11-26 19:53:46 · answer #5 · answered by ? 4 · 0⤊ 0⤋