222 Potential EnergyP8.11From conservation of energy for the block-spring-Earth system,UUgtsi=,or0250980125 0000 1002...kgm sN mm2bgejafh=FHGIKJThis gives a maximum height h=10 2. m .FIG. P8.11P8.12(a)The force needed to hang on is equal to the force Fthetrapeze bar exerts on the performer.From the free-body diagram for the performer’s body, asshown,Fmgmv−=cosθ2Aorgmv=+cos2AFIG. P8.12Apply conservation of mechanical energy of the performer-Earth system as the performer
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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 .