Question

What is the coefficient of rolling friction for the tire under low pressure?

Answer 1

Two bicycle tires are set rolling with the same initial speed of 4.00 along a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40 psi and goes 18.7 ; the other is at 105 psi and goes 93.1 . Assume that the net horizontal force is due to rolling friction only.

Answer 2

find 'a' for the first tire from:

(Vi/2)^2 = Vi^2 -2ad
-(3/4)Vi^2 = -2ad

Ff = ma = mu*mg
a=mu*g
mu = a/g