Chapter 8229*P8.29As the locomotive moves up the hill at constant speed, its output power goes into internal energyplus gravitational energy of the locomotive-Earth system:Ptmgyfrmgrfr=+=+∆∆∆sinθmgvfvffsinAs the locomotive moves on level track,=fvi100027hp746 W1 hpmsFHGIKJ=fbgf=×276 104. NThen also 746 000160 0009 854W kgmsm100 mN2=FHGIKJ+×ejej..vvvf=×=746 000107045W1.06N.P8.30We shall take the zero level of gravitational potential energy to be at the lowest level reached by thediver under the water, and consider the energy change from when the diver started to fall until hecame to rest.∆Emvmvmgymgyfdmg yyf dfmg yydfifikifkk=−+−=°−−−=−=−=+=12121800070 09 8010 05 0050020622cos..diafkgm smmmkN2P8.31UK EU Kiiff++= +∆mech:mgh fhmv212221212−=+fnmg==µµ1hhm m v1
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .