Give me an example of

$7)$ A string is wrapped around a uniform disk of mass M$=1\mathrm{.}7$ kg and radius R$=0\mathrm{.}11$ m$.($Recall that the moment of inertia of a uniform disk is $1/2$MR$^2.)$ Attached to the disk are four lowmass rods of radius b$=0\mathrm{.}17$ m$,$ each with a small mass m$=0\mathrm{.}6$ 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$=27$ N$.$ At the instant when the center of the disk has moved a distance d$=0\mathrm{.}039$ m$,$ a length w$=0\mathrm{.}024$ m of string has unwound off the disk.

$($a$)$ At this instant, what is the speed of the center of the apparatus?

$($b$)$ At this instant, what is the angular speed of the apparatus?

$($c$)$ You keep pulling with constant force $27$ N for an additional $0\mathrm{.}028$ s$.$ Now what is the angular speed of the apparatus?