Physics 121 12/17/10 Prof. E. F. Redish 1 12/17/10 1 Physics 121 12/17/10 2 Physics 121Physics 121 12/17/10 Prof. E. F. Redish 2 12/17/10 3 Physics 121 12/17/10 4 Physics 121 #1 #2 #3 #4 Q1 42% 12% 57% Q2 96% 96% 85% Q3 68% 69% 93% 63% Q4 55% 97% 87% Q5 90%/68% 95% 66% 60% Q6 23%/64% 74% 82% 46% Q7 77% 67% 24% Q8 61% 18% 46% Q9 96% 61% 25% Q10 94% 14% 14% 19%Physics 121 12/17/10 Prof. E. F. Redish 3 12/17/10 5 Physics 121 12/17/10 6 Physics 121Physics 121 12/17/10 Prof. E. F. Redish 4 12/17/10 7 Physics 121 tvatrv==12/17/10 8 Physics 121 mFanet=ABBAFF=Physics 121 12/17/10 Prof. E. F. Redish 5 12/17/10 9 Physics 121 12/17/10 10 Physics 121 lkT =staticABkineticABBAkineticABBABAstaticABBABANfNffμμμμ==sliding slidingnot max2GmMWRmgR= Physics 121 12/17/10 Prof. E. F. Redish 6 12/17/10 11 Physics 121 vmp=tFnet=Ip=I a =Fnetm12/17/10 12 Physics 121 221mvKE =rFnet=Work 12mv2() = F net rPhysics 121 12/17/10 Prof. E. F. Redish 7 12/17/10 13 Physics 121 12mv2+ U()= F non consnet r Ugrav= mgh Uspring=12k x()212/17/10 14 Physics 121 m1 v 1i+ m2 v 2i= m1 v 1f+ m2 v 2f m1 v 1()= m2 v 2() 12mvi2+ U( r i) =12mvf2+ U( r f)12mv2+ U( r )()= 0Physics 121 12/17/10 Prof. E. F. Redish 8 12/17/10 15 Physics 121 =iiirMmR12/17/10 16 Physics 121 (radians)= t=t =sR (radians)=vR=aRPhysics 121 12/17/10 Prof. E. F. Redish 9 12/17/10 17 Physics 121 RmvFRvaradialradial22==12/17/10 18 Physics 121 =iiirmI 2FR=0 0net==netF221221IvmREiii==Physics 121 12/17/10 Prof. E. F. Redish 10 12/17/10 19 Physics 121 Fup= FdownFleft= Frightclockwise=counter clockwise12/17/10 20 Physics 121 yyxxBABAABBA +==cosA B A cos Useful for finding Work. (Why?) A B A sin BAABUseful for finding Torque. (Why?) xyyxBABAABBA == sinPhysics 121 12/17/10 Prof. E. F. Redish 11 12/17/10 21 Physics 121 ApF=gdppfluid+=0p0A pA W = mg 12/17/10 22 Physics 121 Q = Av = constantp = ZQZ =8μLA2Physics 121 12/17/10 Prof. E. F. Redish 12 12/17/10 23 Physics 121 Q1= Q2Q = CT = mcT m1 T1 m2 T2 m1 Tf m2 Tf Q 12/17/10 24 Physics 121 T = TH TC = heat flow (energy/sec)T = Z Z
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