Two bicycles tyres are set rolling with the same initial speed of 3.5m/s on a long straight road and the distance each travels before its speed is reduced by half is measured. One tyre is inflated to a pressure of 40 psi and goes 18.1m; the other is at 105 psi and goes 92.9m, what is the coefficient of rolling friction for each? Assume that the net horizontal force is due to rolling friction only.
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