220_Physics ProblemsTechnical Physics

220_Physics ProblemsTechnical Physics - 222 P8.11 Potential...

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222 Potential Energy P8.11 From conservation of energy for the block-spring-Earth system, UU gt si = , or 0250 980 1 2 5 000 0 100 2 .. . kg m s N m m 2 bg ej af h = F H G I K J This gives a maximum height h = 10 2 . m . FIG. P8.11 P8.12 (a) The force needed to hang on is equal to the force F the trapeze bar exerts on the performer. From the free-body diagram for the performer’s body, as shown, Fm g m v −= cos θ 2 A or g m v =+ cos 2 A FIG. P8.12 Apply 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 .

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