130. The spring is relaxed at y= 0, so the elastic potential energy (Eq. 8-11) is Ukyel=122. The total energy is conserved, and is zero (determined by evaluating it at its initial position). We note that Uis the same as ΔUin these manipulations. Thus, we have 0=++¡=−−KU UK U UgewhereUg= mgy
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.