A string is wrapped around a uniform disk of mass M = 2.5 kg andradius R = 0.04 m. (Recall that the moment of inertia of a uniformdisk is (1/2)MR^2.) Attached to the disk are four low-mass rods ofradius b = 0.07 m, each with a small mass m = 0.5 kg at the end.The device is initially at rest on a nearly frictionless surface.Then you pull the string with a constant force F = 25 N. At theinstant when the center of the disk has moved a distance d = 0.035m, a length w = 0.021 m of string has unwound off the disk.
(a) At this instant, what is the speed of the center of theapparatus? v = ___ m/s
(b) At this instant, what is the angular speed of theapparatus? omega1 = _____ radians/s
(c) You keep pulling with constant force 25 N for an additional0.040 s. Now what is the angular speed of the apparatus? omega2 = _____ radians/s
