A solid uniform disk of radius 0.250 m and mass 55.0 kg rolls down a ramp of length 4.50 m that makes an angle of 15 degrees with the horizontal. The disk starts from rest from the top of the ramp. Find a) the speed of the disk's center of mass when it reaches the bottom of the ramp and b) the angular speed of the disk at the bottom of the ramp.
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