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Why is the co efficient of kinetic friction less than static friction?
Wiki User
∙ 9y ago
Because it's harder to get something to start moving than keep it moving if it already is. Coefficients of friction are merely constants dependent on the two surfaces in contact. Carpet has a higher coefficient of friction than ice because carpet has more microscopic bumps which oppose motion than smooth ice does.
Wiki User
∙ 9y ago
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As soon as an object starts moving what replaces static friction?
Kinetic Friction replaces Static Friction when an object is in motion.
The force needed to overcome kinetic friction is usually less than that needed to overcome static friction true or false?
false
Is The force needed to overcome static friction usually less than that needed to overcome kinetic friction.?
True -It's "False"!
What type of friction is the frictional force needed to start on object at rest into motion?
Static
What are microwelds?
Table of CoefficientsThe coefficient of kinetic friction is always less than or equal to that of static friction.The table below shows many coefficients of friction. Notice that each value is always given for a pair of surfaces. Friction doesn't work unless there are two surfaces.Also note that there are values shown for both static friction and kinetic friction. Static friction deals with starting to move something, while kinetic friction deals with keeping something moving once it's already in motion.In each case, it's also important to note that the coefficients of kinetic friction are always less than or equal to the coefficients of static friction. objectWrite('');Coefficients of Friction for Pairs of SurfacesSurfaces in ContactCoefficient of Static Friction (s)Coefficient of Kinetic Friction (k)Wood on wood0.50.3Waxed ski on snow0.10.05Ice on ice0.10.03Rubber on concrete (dry)1.00.8Rubber on concrete (wet)0.70.5Glass on glass0.940.4Steel on aluminum0.610.47Steel on steel (dry)0.70.6Steel on steel (lubricated)0.120.07Teflon on steel0.040.04Teflon on Teflon0.040.04
The forces needed to overcome static is usually less than that needed to overcome kinetic friction?
True -It's "False"!
The force needed to overcome kinetic frictions is usually less than that needed to overcome static friction?
True -It's "False"!
What is the different between istatistic and kinetic friction?
I assume you mean static and kinetic friction. Static friction tends to be stronger and less predictable. For example, if you start applying more and more force to a stationary brick lying on sandpaper, it is almost impossible to predict when it will begin to move. Once it is moving, however, you can get a pretty consistent estimate for how much drag the brick is experiencing (kinetic friction). Modern cars have computers monitoring the brakes. If you slam on your brakes, the computer will loosen up the brakes to prevent you from skidding. This is because static friction is more effective than kinetic friction, and once you start skidding out you have lost most of your braking power.
Why kinetic friction is less than sliding friction?
there is more surface area contact with kinetic friction as opposed to sliding friction
Define sliding friction and rolling friction?
sliding friction is less than static friction. it is also very easy to move better than static friction.
What is the effect of decreasing the block in contact with the table on kinetic friction?
less friction
What is the difference between static friction and sliding friction?
Sliding friction is always less than the static friction by small amount.
