1 D collisions - Title of the Experiment collisions in one...

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Title of the Experiment: collisions in one dimension (Conservation of Linear Momentum and (Sometimes) Energy) Student’s name: Section SLN: TA’s Name: Week of the experiment:
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Objectives The objective of this lab was to investigate conservation of linear momentum and energy in collisions in one dimension, both in elastic and inelastic collisions. The lab aims to show that momentum is always conserved when there is no net external force acting on the system and it will also show that energy is only sometimes conserved in various kinds of collisions. Experimental data Collision m 1 kg m 2 kg V 1i m/s V 2i m/s V 1f m/s V 2f m/s Elastic collision #1 0.266 0.266 0.912 0 0 0.899 Elastic collision #2 0.266 0.516 0.787 0 -0.235 0.528 Inelastic collision #1 0.266 0.266 0.974 0 0.474 0.474 Inelastic collision #2 0.266 0.516 1.03 0 0.336 0.336 Data analysis Derive eqn (6), for elastic collisions For m 1 =m 2 (v 2f -v 1f )/(v i2 -v i1 ) V 2f =0.899 V 1f =0 V i2 =0 V i1 =0.912 Hence, (0.899-0)/ (0-0.912) =0.899/-0.912 =-0.9857 For m 1 <m 2 V 2f =0.528 V 1f =-0.235 V i2 =0 V i1 =0.787 Hence,(0.528-(-0.235))/(0-0.787)
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=0.763/-0.787 =-0.9695 Relative percentage change in momentum Elastic Collision #1 Pi=0.242592 kg m/s Pf= 0.239134 kg m/s Change in p= pf-pi=0.239134-0.242592=-0.003458 kg m/s Relative percentage change=(-0.003458/0.242592)*100%
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