- #1

bobie

Gold Member

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## Homework Statement

I could not find anywhere an example of inelastic head-on collision, all examples are of bodies crashing into an object at rest.

I do not have a specific question, if you have, I'd appreciate it. I just want to know in general:

suppose a ball A (of mass 100 kg rolling at speed 1 m/s, so, p = 100, KE = 50 J) collides head on with another ball B . In order to stop A I know we need to do 50J, right? so, if B has mass 4 and speed 5 m/s (p= 20 . E = 50J) will it stop A in its track even if it has 1/5 of its momentum?

Suppose now that B has speed 1 m/s (p=4, E =2J) and they collide and stick together without any deformation, should we subtract 50-2 = 48 to find The kinetic energy and then speed and momentum of A-B?

Thanks for your help. A link will do

## Homework Equations

E = mv^2/2 p = mv