A stone has a mass of 7.00 10-3 kg and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.75. When the tire surface is rotating at a maximum speed of 10 m/s, the stone flies out of the tread. The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N. Assume that only static friction supplies the centripetal force, and determine the radius r of the tire.

### Recently Asked Questions

- A Dodge Colt can accelerate (speed up) from rest at a rate of 4.0 m/s2. A Ferrari can acceler- ate from rest at a rate of 9.0 m/s2. Starting from rest at the

- Chuck (mass = 70 kg) and Dan (mass = 80 kg) are working as window washers at Walter Library. Chuck gets the bright idea of tying each of them to either end of

- What is the muddiest point in interpreting statistics used in public health?