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The 6 Cases, image, image, image, image, When two balls collide, they…
The 6 Cases
Inelastic
m1v1i+m2v2i = vf(m1+m2)
After collision, objects stick together; same vf.
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When two balls collide, they separate after the collision
when two roller-skaters are stationary and one pushes the other, they separate finally. That is why it is elastic.
when two cars collide and the front of one car attaches to the back of the other, they have the same final velocity.
in this case, vf and Θ are given, and formulas are used to solve for vi
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