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If your pulling 30 lb tire on a lawn what is the estimated weight youre actually pulling because of friction?
Wiki User
∙ 12y ago
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 / 30
x = 0.5 * 30
x = 15 lbs f
anything 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 1.0
actually , some friction coefficients do exceed 1.0 , see Google / friction coefficients table
Wiki User
∙ 12y ago
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