discuss this topic in relation to motor vehicle tyres?
2007-02-11 04:58:39 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
The reason the answer and common sense don't seem to match is this:
* The frictional force is NOT dependent on area, only on the materials in contact (coefficient of friction of rubber/asphalt interface) and the normal force (usually vehicle weight, also a component of acceleration/deceleration of a vehicle can contribute to this normal force).
* However, the ability of the vehicle's tire to withstand the frictional force IS dependant on the area of contact. Force over area is pressure, also stress, which determines if the material yields or not. In other words, with a small contact area, the tire skids (leaving black streaks on the road) and with large contact area it sticks. That is why race cars run slicks. More contact area means the rubber compounds can withstand higher friction forces on the vehicle's tires.
The frictional force is not dependent on the contact area. The frictional stress IS dependent on contact area.
2007-02-15 04:54:03 · answer #1 · answered by Jay-Dawg 2 · 0⤊ 0⤋
According to my Physics class, the answer is no. Area is not a factor. Just the total force. Hence the coefficient of friction does not depend on Area involved.
2007-02-11 05:13:19 · answer #2 · answered by rscanner 6 · 0⤊ 0⤋
Amontons' 2nd regulation: The rigidity of friction is self reliant of the plain area of touch. Amontons' 2nd regulation is an idealization assuming completely inflexible and inelastic factors. working example, wider tires on automobiles grant greater traction than slender tires for a given motor vehicle mass via fact of floor deformation of the tire Rolling resistance in tires is on the subject rely of the touch area of the tire. In tires, tread thickness and shape has lots to do with rolling resistance. The thicker and greater contoured the tread, the better the rolling resistance subsequently, the "quickest" bicycle tires have little or no tread and heavy duty automobiles get the ideal gas economic device via fact the tire tread wears out. ==================================
2016-12-17 07:28:34 · answer #3 · answered by zell 4 · 0⤊ 0⤋
Only to a certain degree because friction occurs at only certain spots to a molecular level.
2007-02-11 05:06:17 · answer #4 · answered by tomgreen.com the channel fan198 2 · 0⤊ 0⤋