A woman of mass m stands at the edge of a solidcylindrical platform of mass M and radius R. At t = 0, theplatform is rotating with negligible friction at angularvelocity (Oq about a vertical axis through its center, and thewoman begins walking with speed v (relative to the platform)toward the center of the platform, (a) Determine theangular velocity of the system as a function of time.(b) What will be the angular velocity when the womanreaches the center?
• KeyPoints o UnitofforceandmagnitudeismeasuredinNewtons o Direction=+or- o ObjectofInterest:theobjectbeinganalyzed o Makesuretoaskyourself,“Isitfalling” o NetForce:thesumofforces o Equilibrium:netforce=0 o System:objectofinterestandobjectexertingforcesonit o Contactforce:theforcewheretwoobjectsmeet o Forcediagrams:representforcesexertedonobjectofinterest • ForceDiagrams 1. Useadotforobjectofinterest. F(HAND) 2. Labelobjectofinterest.(PoolBall) 3. Listforcesthatotherobjectsexert