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UMD PHYS 122 - Lecture Slides

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2/2/11 1 Physics 1222/2/11 2 Physics 1222/2/11 3 Physics 1222/2/11 4 NYC – The Real Thing (Landsat photo) NYC – Subway map (c. 1948) NYC – Subway map (current) Physics 1222/2/11 Physics 122 Physics 1222/2/11 6 Physics 1222/2/11 11 Physics 122 tx cos=tAvtAx000sincos==2/2/11 12 Physics 122  1 sin  cos 2/2/11 13 Physics 122 cos() cos(0t) What does changing 0 do to this graph?2/2/11 16 Physics 122 TTTtt220:20:000== 2/2/11 17 Physics 122 x t t 0 x(t) = Acos(0t)x(t) = Acos(0(t  t0))x(t) = Acos( 0(t  t0))= Acos( 0t  0t0) = Acos( 0t )2/2/11 18 Physics 1222/2/11 19 Physics 122 FS MFE Ma =1mFnetFnet= kxa = 02x02=kmx(t) = Acos(0t )0=2 TMeasured from where? Interpret!2/2/11 20 Physics 122 221mvKE =rFnet=Work ()rFmvnet= 2212/2/11 21 Physics 122 Ug= mgh Uspr=12k l()22/2/11 22 Physics 122 12mvi2+U(ri) =12mvf2+U(rf)12mv2+U()= 0 12mv2+U()=Fnon consnet r2/2/11 23 Physics 122 FS MFE ME =12mv2+ mgh +12k l()2Ei= EfMeasured from where?2/2/11 28 Physics


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UMD PHYS 122 - Lecture Slides

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