A solid, uniform disk of radius 0.250 m and mass 47.9 kg rolls down a ramp of length 4.00 m that makes an angle of 13° with the horizontal. The disk starts from rest from the top of the ramp.
(a) Find the speed of the disk's center of mass when it reaches the bottom of the ramp.
_______m/s
(b) Find the angular speed of the disk at the bottom of the ramp.
________rad/s