5 S IF THE EXTERNAL FoRCES ARE CONSERVATIVE THEN THE ENERGy Ec= Tc+Vc= CoNSTANT PoTEATAL ENERGY A6S0cIATEO WITH PosITION C.0.M 工 F THE INTERNAL FORCES;R∈fs0 COwSERVATIVE THEN THE ToTAL ENERGY OF THE SYSTEM E= Ttv C0川 STANT POTENTIAL ENEREY of ALL PARTICLES READ EXAMPLE 4-1 PAGE(4-1 cAS∈ RVATIVE FoRcE ONE FOR WHH 宇、战 工 s A FACT1 N OF THE E小 P POINTS A AND AN0 工 EPENOENT叶FT化E?T以 TAKEN