http://phet.colorado.edu/sims/collision-lab/collision-lab_en.html
Run the simulation and draw a diagram that represents Pi - the momentum before the collision.
Underneath that diagram draw another diagram that shows two vectors - P1f and P2f - the final momentums of ball 1 and ball 2 after the collision. Include a third vector that represents Pf - the sum of the former two vectors.
Using formula, calculate the total kinetic energy before and the total energy after the collision.
Repeat step 1 but first change the Elasticity to 50%.
Reset the elasticity to 100%. Using

Question

http://phet.colorado.edu/sims/collision-lab/collision-lab_en.html 
Run the simulation and draw a diagram that represents   Pi  - the momentum before the collision.
Underneath that diagram draw another diagram that shows two vectors -  P1f and  P2f - the final momentums of ball 1 and ball 2 after the collision. Include a third vector that represents  Pf  - the sum of the former two vectors.
Using formula, calculate the total kinetic energy before and the total energy after the collision.
Repeat step 1 but first change the Elasticity to 50%.
Reset the elasticity to 100%. Using

leelaa · Answer

need help drawing the diagrams