Wider tires have less rolling resistance
Debate Rounds (3)
According to newton's laws of motion-
the force of friction f is defined, when moving, to be f = (Uk)*N, where N is the normal force and Uk is the kinetic friction coefficient. The normal force repels the force of gravity, so N up = mg down
thus, the equation is modified, f = (Uk)*m*g, where g is the acceleration from gravity, and mass is in Kilograms.
Therefore, according to newton's equation, the force of friction is actually proportional to the mass and the force of gravity rather than the area, or width of the tire.
Logically this is rather clear; if you have a mass m on a thin tire, even though there is less surface area on the thin tire, there are More newtons per area, which compensates and maintains the same amount of friction. A wider tire, although it has more surface area, has fewer newtons per area, and so friction ends up being the same across the surface integral.
In conclusion, according to physics and Newton's laws of motion, wider tires have the same resistance as thin tires for an identical mass.
"Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface. It is mainly caused by non-elastic effects, that is, not all the energy that is needed for deformation (or movement) of the wheel, roadbed, etc. is recovered when the pressure is removed."
The rolling resistance is equivalent to newton's law of friction and can be specifically defned as F = Crr*N, where F is in newtons, Crr is the dimensionless rolling coefficeint depending on material. F only depends on the radius of the wheel as well as the normal force, which equals m*g.
"According to Dupuit (1837), rolling resistance (of wheeled carriages with wooden wheels with iron tires) is approximately inversely proportional to the square root of wheel diameter. "
Thus, only wheel radius affects rolling resistance.
tatrafan77 forfeited this round.
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1 votes has been placed for this debate.
Vote Placed by Juris_Naturalis 3 years ago
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Reasons for voting decision: Pro didn't make any sense. You can't have 2 tire of the same size and mass loaded to the same pressure but one ends up being wider. That doesn't make sense. And pro didn't seem too polite by his tone.
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