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  1. #12
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    this thread = stupidest sh1t ever.

    Quote Originally Posted by v1c10us View Post
    Okay, if this doesn't shut you guys Up i'll have to get really technical.

    "Occasionally it is maintained that µ is always < 1. While in most relevant applications this is true, having a µ > 1 merely implies that the force required to slide an object along the surface is greater than the normal force of the surface on the object. For example, silicone rubber or acrylic rubber coated surfaces have a coefficient of friction that can be substantially larger than 1."
    This includes tires, which means if tires were made of wood what you are saying is correct, but since they are not, it is incorrect because µ is greater than 1 not less than 1

    Also you have to take into account that the normal force is being varied by the brakes, its not constant because the brakes are not an ON OFF machine;
    Since the friction force is a product of the kinetic friction and the normal force. Since the FULL normal force is being applied when the brakes are locked up the frictional force is greater than when the normal force is not being fully applied in order to keep the tires rolling, this reduction reduces the elements in the equation and results in a lower product, or in this case a lower frictional force.
    edit: it would be different if the brakes were always fully applied, you would have equal forces at work, but due to the increased force and the decreased sliding friction it equates to the sliding friction of the tire being slightly greater than the rolling friction.
    You also have to take into account the maximum static friction the 2 materials can attain, but thats not really relevent because its not very much.
    u know how i know u are st00pid?
    cuz u forgot time in the equation. and i know that equation.
    it's barely used btw. if ur gonna argue about something that moves, ur gonna need time.
    also ur argument doesn't make sense because u aren't taking the mass into account.

    you say: "friction force is a product of the kinetic friction and the normal force"
    friction force = kinetic friction x normal force


    "Since the FULL normal force is being applied when the brakes are locked up the frictional force is greater than when the normal force is not being fully applied in order to keep the tires rolling, this reduction reduces the elements in the equation and results in a lower product, or in this case a lower frictional force."


    assuming that ur equation is correct somehow, you are still wrong.
    u said "normal force is not being fully applied in order to keep the tires rolling, this reduction reduces the elements in the equation and results in a lower product"

    there is no reduction. if there is a reduction, then u would be changing your equation to:
    [friction force = kinetic friction x (final force - initial force)]
    unfortunately, in this topic, we have no final force. we only have initial. so that sums up how there is no reduction.

    second,your equation is wrong because there is no constant.
    you are dealing with 3 variables in your explanation. that's like fingering 3 pussies when you only have 2 arms with hands. there has to be atleast 1 given number at a certain measurement if we want to deal with the basic application of friction, momentum, mass, change in friction due to heat, etc.
    you say: "friction force is a product of the kinetic friction and the normal force"
    friction force = kinetic friction x normal force


    yes, if one side of a product equation goes down, the other side will as well.
    however, following your equation and explanation,
    if you say the normal force decreases, so the friction force decreases, then where have the kinetic force gone?

    fix your equation. or fix your explanation. or fix both.
    Last edited by oldskoofame; 08-20-2008 at 03:26 AM.

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