Chuck U. Farley lives on the East Coast and is in the middle of changing SUV tires in his auto shop when it starts to snow. They just delivered the customer's wheel mounted tires so he starts rolling up one of his 70 pound tires straight up the driveway which has an incline of about 1/4 inch per foot. The snow starts to pack around the back of the tire at about 3 inches deep.
Given that the static coefficient of friction between the tire rubber and the snow is estimated to be about 0.08 and his tire has a 19 inch diameter, do you think the tire will slip out from under him? You can assume that the tire doesn't deform and is rigid.
Possible Answers:
(A) The tire will slip out from under him - he has no business out in the snow anyway because he grew up in Southern California.
(B) He's lucky because the tire will not slip and, even if it did, the snow will keep it from moving down the incline.
(C) The tire will slip, start to spin, and fall down the incline plowing into an unsuspecting dear.
(D) None of the above because I don't believe in physics.
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