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Conservation of Momentum - hdbk1010_90
Momentum Summary

Classical Physics - Physics theories and other related topics
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vf   m1v1   m2v2 m1   m2 vf   m1v1   m2v2 m1   m2 vf   (2300  lbm)(29  ft/sec)   (2800  lbm)(11  ft/sec) 2300lbm   2800  lbm vf   19.1  ft/sec Force and Motion MOMENTUM PRINCIPLES Rev. 0 Page 9 CP-03 If the initial velocities of the two objects (v  and v ) are known, then the final velocity (v ) can 1 2 f be calculated by rearranging Equation 3-10 into Equation 3-11. (3-11) Example: Consider that the railroad cars in Figure 1 have masses of m  = 2300 lbm and 1 m  = 2800 lbm.  The first car (m ) is moving at a velocity of 29 ft/sec and the second car 2 1 (m ) is moving at a velocity of 11 ft/sec.  The first car overtakes the second car and 2 couples with it.  Calculate the final velocity of the two cars. Solution: The final velocity (v ) can be easily calculated using Equation 3-8. f







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