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A 10 kg block is held in position against a vertical wall by the application of a horisontal force of magnitude 100 N as shown in the sketch The coefficients of static and kinetic friction between t?
Wiki User
∙ 14y ago
There's no way to know, all you can say is that the upward friction force = 98,1N, and thus that the static friction coeff is bigger than 98,1/100=0,981.
To know the static coeff, you should gradually make the horizontal force smaller and see when the block falls down.
As for the kin. coeff, you should know the acceleration at which it is falling down.
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∙ 14y ago
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If your pulling 30 lb tire on a lawn what is the estimated weight youre actually pulling because of friction?
the equation for static friction coefficient is:static friction coefficient = force required to break bond / weight of object (tire)you need the friction coefficient between rubber and grass, say its 0.5, this means the force you have to apply to equal the friction force is:0.5 = x / 30x = 0.5 * 30x = 15 lbs fanything greater than 15 lbs f will break the bond and accelerate the tire.notes :1 / moving friction coefficient is usually less than static friction coefficient, so youve less drag once its moving.2 / friction coefficients are never greater than 1.0actually , some friction coefficients do exceed 1.0 , see google / friction coefficients table
How does friction affect any or all of Newton's laws?
Uhmmm, well... this may be disappointing, but the answer is not at all. Friction is not some weird thing that never occurred to Newton. We actually have coefficients of friction that you can put into equations that will quantify how fast your cat will slide down an inclined plane versus you in your sandpaper jeans.
A horizontal force of 40 newtons will just start a 600 newton empty sled moving across packed snow what is the coefficients of static and kinetic friction?
static friction= normal contact force*coefficient of static friction 40 = (600*9.8) * CSF CSF=40/(600*9.8) (you can calculate that yourself, i cant be bothered) there isn't enough info to work out the coefficient of kinetic friction
Which surface friction is the highest carpet plastic wood marble?
carpet has the most fictionThis cannot be answered really. Friction requires 2 surfaces in contact with each other . Rubber on Wood, has a high coefficient of friction, but plastic on wood has a low coefficient of friction. You must state , the make of the material you are going to use to slide over the Carpet, or Plastic, or Wood. Also , different types of carpet or plastic or wood will have very different friction coefficients. Example Nylon carpet is very easy to slide things along, but wool or cotton carpet is a very different story. There are many types of plastic which are rubbery in nature and they offer a lot of frictional resistance.
If a book is pushed by 10N and the friction is 8N what is the resultant force?
In fact, there is an infinite number of answers because force is a vector, meaning that it has a magnitude and an orientation. For example, if someone pushes horizontaly onto the book (10N) and the friction is 8N in the opposite direction, the resultant force is 2N. But if the book is pushed at an angle, the resultant force changes.
Why do materials have different coefficient of friction?
Different materials have different coefficients of friction because the materials have different microscopic bumps and valleys which cause the friction to begin with. Coefficients of friction are constant for each material.
What two kinds of coefficients of friction exist?
Static and kinetic coefficients
Why is it difficult to start a cart than to pull it after starting?
Because the coefficients of static friction in the bearings etc. are (as always) larger than the corresponding coefficients of dynamic friction.
What pattern do you notice about the values for the coefficients of friction?
The value of static friction is higher than the value of kinetic (sliding) friction.
How can you decrease magnitude of friction?
you don't.
How can you decrease the magnitude of friction?
you don't.
What are two examples of two surfaces that have a high coefficient of friction?
Sandpaper and asphalt both have relatively high coefficients of friction.
Why are coefficients of friction unitl-ess values?
Contacting surfaces can be of various materials
What has the author I I Blekhman written?
I I. Blekhman has written: 'On effective coefficients of friction for vibrations'
How do friction and gravity relate?
The magnitude of friction is proportional to the magnitude of the normal force which is proportional to the magnitude of gravity(The magnitude of the normal force is indirectly proportional to the magnitude of gravity.). The magnitude of the normal force, N, compared to gravity, G, on angle z, is: N=cos(z)*G On a flat surface. N=G The coefficient of friction, whether static or kinetic, f is therefore: N=cos(z)*G*f
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
What are different forms of friction?
Static friction and sliding friction. Static friction is the force that stops a mass from sliding and sliding friction is the force that slows down an object that is already sliding. Static friction is stronger than sliding friction, and this difference is reflected in different coefficients of friction for sliding and static friction for a given surface.
