the kinetic energy is held constant between objects within a system. and in the third case. inelastic. 2012 Various types of collisions may occur—in the first situation. or perfectly inelastic • For the elastic. kinetic energy increases as a result of some other form of non­ mechanical energy changing to mechanical energy; in the second case. always start with LCE and use LCP if necessary • For the inelastic. kinetic energy decreases as a result of changing to some other form of energy Mar 27­5:47 PM • The central challenge to determining the method of solution is to first determine if the collision is elastic. only LCP can be used • For the perfectly inelastic. collisions… Mar 27­5:47 PM 2 . only LCP can be used and the Pf qty will be a mass sum at a single vf And.Ch 11 Notes April 23 April 23.
Ch 11 Notes April 23 April 23. 2012 • Law of Conservation of Energyè Eo = Ef PEo + KEo = PEf + KEf for every object in the system • Law of Conservation of Momentumè Po = Pf P1o + P2o = P1f + P2f or (m1 + m2)vf for the perfectly inelastic collision Thus the Equations… Mar 27­5:47 PM 3 .