Is this right?
For this example I will use a rectangular wood block. It is slid on a piece of wood. It is then turned on it's side (less SA) and once again slid on the piece of wood.
The Static (Initial) friction will be equal no matter what the surface area of the wood. So in both cases the static friction should be the same?
For kinetic friction it should also be equal in both cases?
Please confirm if this is right or wrong, it is the kinetic friction I am a bit confused about right now. Any help is much appreciated.
2006-11-24 13:19:56 · 8 answers · asked by Ted 2 in Science & Mathematics ➔ Physics
If this is wrong (and knowing me I could be completely off) would you please let me know exactly how this works? Should either the kinetic and static frictions be the same, or should the kinetic frictions be different?
Thanks in advance, this is really bugging me.
2006-11-24 13:23:31 · update #1
The force due to friction (whether static or kinetic) is dependent on the appropriate coefficient of friction (static or kinetic), between the materials, and the mass of the object (which defines the NORMAL force between the two surfaces).
By the way, the coefficient of static friction is ALWAYS greater than for kinetic friction.
Now, no matter what the surface area, the normal force will remain the same, since the mass remains the same. In other words, no matter what side you put the block on, the force due to static friction and the force due to kinetic friction will not change.
Hope this helps!
2006-11-24 13:58:21 · answer #1 · answered by Mez 6 · 1⤊ 0⤋
I believe they are equal - Surface area doesn't matter, just what the objects in contact are made of. Of course, static friction will always be higher than kinetic friction - but I recall in my physics class a chart which gave friction constants (mu) depending on the materials (wood on glass, wood on wood, etc...) if memeory serves me right.
2006-11-24 13:30:36 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Both static friction and kinetic friction do not depend upon the area of contact.
But there is another friction called rolling friction which depend upon the area of contact. Rolling friction increases with the increase of surcface area.
2006-11-24 17:36:45 · answer #3 · answered by Pearlsawme 7 · 1⤊ 0⤋
the equation for resistance force of friction is:
F(friction) = F(normal) * M(fric)
Where F(normal) is the force normal to the surface (on a flat surface, it's the weight) and M(fric) is the code for the coefficient of friction between the two surfaces.
What this means in english... the force of friction is determine based on the weight of the object, the angle of the surface that you're on, and the two surfaces used. It is not dependant on surface area at all. The short answer to your question, then, is yes, the friction is the same for all cases you stated.
2006-11-24 13:57:26 · answer #4 · answered by promethius9594 6 · 1⤊ 0⤋
nicely, there is extremely plenty occurring with a wheel on the line. before everything, while acceleration is utilized, the tire might tend to slide on the floor ensuing in a loss of capability. This capability has to circulate someplace and it does, it heats up the tire. you will locate this in case you improve up very problematical and bring clouds of smoke! Now, the quantity of capability that gets switched over to warmth will count upon the coefficient of friction and shipment yet no longer the floor section. If the floor section is amazingly small, the tire melts very rapidly and bursts. If the floor section is massive, the warmth is unfold over a extra robust section and the tire won't soften and burst. because it rotates, the tire is often deforming (bending). This generates warmth which should be dissipated and is carried out extra suitable with a great tire than a small one. As a remember of pastime, the persistent deforming of a tire eats up an intensive volume of capability and bills for countless the capability required to circulate a automobile at speed. because of the fact of this metallic wheels working on metallic rails are extra helpful. The low profile tires which you notice on some sporty fashions of automobile shrink the quantity of capability lost with the aid of deformation of the tire.
2016-11-26 20:48:17 · answer #5 · answered by ? 4 · 0⤊ 0⤋
The more surface area the more friction.
2006-11-24 13:28:08 · answer #6 · answered by roscoedeadbeat 7 · 0⤊ 5⤋
i dont think so but im not 100% sure. ask a math teacher
2006-11-24 13:24:16 · answer #7 · answered by ndbt 4 · 0⤊ 2⤋
no not at all
2006-11-24 13:21:13 · answer #8 · answered by Ashwin M 3 · 0⤊ 4⤋