A800-gram grinding wheel 27.0 cm in diameter is in the shape of a uniform solid disk. (we can ignore the small hole at the center.) when it is in use, it turns at a constant 245 rpm about an axle perpendicular to its face through its center. when the power switch is turned off, you observe that the wheel stops in 50.0 s with constant angular acceleration due to friction at the axle?

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?