A 1.80-m-tall person stands 3.80 m from a convex mirror andnotices that he looks precisely half as tall as he does in aplane mirror placed at the same distance. What is the radiusof curvature of the convex mirror? (Assume that sin 0 ~ 0.)[Hint: The viewing angle is half.]
• 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
