From this website answer the Qu http://phet.colorado.edu/sims/collision-lab/coll

Question

From this website answer the Qu

http://phet.colorado.edu/sims/collision-lab/collision-lab_en.html

a) Set the two masses equal to each other and restart the simulation, keeping the collision 100% elastic. Describe what happens after the collision. Why do you think this happens?

b) Now set the elasticity to 0% (perfectly inelastic). Now what happens after the collision? How do the final velocities of the masses compare to the initial velocity? Is momentum still conserved?

c) Return the elasticity to 100%, and change the mass of the moving ball to be twice that of the second ball. Turn on the Show Values box. Write the equations for the total momentum before and after the collision and verify that these values are correct.

d) Repeat step b) except make the stationary mass twice the moving mass.

e) Turn the elasticity back 0%. Repeat steps c) and d).

f) What do your answers for c)-e) suggest for the impulses delivered in elastic collisions versus inelastic collisions? Which kind of collision would you rather be involved in?

Explanation / Answer

AFTER COLLISION THEY move in opposite directions and their velocities interchange,..MOMMENTUM CONSERVED

B..THEY STICK TO EACH OTHER AND DONT MOVE AFTER COLLISION...MOMMENTUM ISNT CONSERVED

C...ball with less mass will have more velocity after collision ....1.67m/s&0.33m/s are velocities...mommentum conserved

d..mommentum conserved...stationary mass gets v=1.33m/s and moving mass=0.33m/s

e,...mommentum consv....both masses move with 0.33m/s for inelastic

impulse delivered in elastic collision causes more mommentum of other body and in inelastic collision the mommentum caused is less

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