Kmmvicp=+=+=×1212290 076001271 102210dibgbg..kg 150.0 kgm / sJ. (d) The total kinetic energy after the clamp is released is ()()()22101111290.0 kg 7290 m/s150.0 kg 8200 m/s221.275 10J.fccppvmv=+=×The total kinetic energy increased slightly. Energy originally stored in the spring is converted to kinetic energy of the rocket parts. 89. We assume no external forces act on the system composed of the two parts of the last stage. Hence, the total momentum of the system is conserved. Let mcbe the mass of the rocket case and mpthe mass of the payload. At first they are traveling together with velocityv. After the clamp is released mchas velocity vcand mphas velocity vp.Conservation of momentum yields (mc+ mp)v = mcv
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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.