Chapter 9277P9.62Consider the motion of the firefighter during the threeintervals:(1) before, (2) during, and (3) after collision with theplatform.(a)While falling a height of 4.00 m, his speed changesfrom vi=0 to v1as found from∆EKU KUffii=+−−dibg, orKEUKUii=−++∆When the initial position of the platform is taken asthe zero level of gravitational potential, we have121800 012mvfhmgh=°−++cosafSolving for v1givesv1v2FIG. P9.62vfh mghm122 30040075098040075 0681=−+==afch...... ms(b)During the inelastic collision, momentum is conserved; and if v2is the speed of thefirefighter and platform just after collision, we have mvmM v
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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 .