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-Physician
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Homework Statement
What's the friction's formula, and what do the formula pieces mean, thanks :)
Homework Equations
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The Attempt at a Solution
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Normal force is equal to the force pushing against a surface. If the surface is horizontal, then N=mg. If it is a ramp, N=mgcosθ. Like I had said before, normal force isn't always gravity, but in more cases than not it is.And would the normal force be N=G=mg?
-Physician said:Okay this is the last question , is Kinetic Force equal to Force of friction ?##F_k = F_f##
The force of friction is a resistance force that occurs when two surfaces are in contact and moving relative to each other. It acts in the opposite direction of the motion and can be caused by the roughness of the surfaces or the presence of fluids between them.
The force of friction can be calculated by multiplying the coefficient of friction, which is a measure of the roughness of the surfaces, by the normal force, which is the force perpendicular to the surfaces. The resulting value is the amount of force that must be overcome to keep the surfaces moving at a constant velocity.
The force of friction is affected by the type of surfaces in contact, the weight or mass of the objects, and the presence of any lubricants or fluids. It is also influenced by the degree of motion between the surfaces, with more force needed to overcome static friction (when the surfaces are not moving) compared to kinetic friction (when the surfaces are in motion).
The force of friction always acts in the opposite direction of motion, so it can either slow down or stop objects in motion. It can also be used to generate motion, such as when walking or driving a car, where the force of friction between the ground and the feet or tires provides the necessary traction for movement.
The force of friction can be reduced by using lubricants or smooth surfaces, or by decreasing the weight or mass of the objects in contact. It can also be reduced by decreasing the surface area of contact between the objects, as less surface area means less friction. In some cases, the force of friction can be completely eliminated, such as in space where there is no air resistance to oppose motion.