10-8-MomentumII - Elastic Collisions in 1 dimension Momentum is conserved m1vi1 m2 vi 2 m1v f 1 m2 v f 2 Kinetic Energy is conserved(meaning of

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1 Elastic Collisions in 1 dimension Momentum is conserved 2 2 1 1 2 2 1 1 v v v v f f i i m m m m 1 2 m 1 v i1 2 1 2 m 2 v i2 2 1 2 m 1 v f1 2 1 2 m 2 v f2 2 Kinetic Energy is conserved (meaning of elastic) total f total i KE KE , , Elastic Collision: Solutions for stationary target •Conservation of momentum 2 2 1 1 1 1 v v v f f i m m m 1 2 m 1 v i1 2 1 2 m 1 v f1 2 1 2 m 2 v f2 2 v f 1 m 1 m 2 m 1 m 2 v i 1 v f 2 2 m 1 m 1 m 2 v i 1 •Conservation of kinetic energy
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2 Example 1 of elastic collision: a lighter stationary target v i1 v i2 =0 Before m 1 m 2 After v f1 m 1 v f2 m 2 m 1 = 10 kg m 2 = 1 kg v i1 = 5 m/s Find v f1 , v f2. Elastic collision 1 2 1 1 2 1 2 1 2 1 1 2 i f i f v m m m v v m m m m v s m s m kg kg kg kg / 09 . 4 ) / 5 ( 1 10 1 10 9.09m/s (5m/s) kg kg kg 1 10 ) 10 ( 2 v i1 v i2 =0 Before m 1 m 2 =2m 1 v f1 v f2 After m 1
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This note was uploaded on 11/06/2010 for the course PHYSICS 1220 taught by Professor Yung during the Fall '09 term at Missouri (Mizzou).

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10-8-MomentumII - Elastic Collisions in 1 dimension Momentum is conserved m1vi1 m2 vi 2 m1v f 1 m2 v f 2 Kinetic Energy is conserved(meaning of

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