EXERCISE $2$

If at a given instant, the disk in Figure $2$ is rotating clockwise with an initial angular

velocity of $360rpm,$ knowing that the kinetic coefficient of friction between the disk

and the lever is $0\mathrm{.}35,$ calculate:

$($a$)$ The free body diagrams $(0\mathrm{.}5pts.$

b$)$ The force $P$ required to brake the disk so that it stops after $100$ revolutions $(2\mathrm{.}0pts.$

Data: Rdisc $=160mm,a=200mm,d=300mm,10($disc$)=20kg*m2$