Two bicycle tires are set rolling with the same initial speed of 3.40m/s along a
ID: 2187298 • Letter: T
Question
Two bicycle tires are set rolling with the same initial speed of 3.40m/s 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 18.2m ; the other is at 105 psi and goes 93.9m . Assume that the net horizontal force is due to rolling friction only. A.What is the coefficient of rolling friction mu_{r} for the tire under low pressure? B.What is the coefficient of rolling friction mu_{r} for the second one?Explanation / Answer
frictional force = *mg
acceleration = -g
using equation of motion
u^2-v^2=2*a*s
(1/4)* v^2 =2*a*s
1) =.008
2)=.00157