- #1
Hanga
- 14
- 0
This is not dircectly a coursework question, rather I need someone to tell me what is correct and what is not correct in my assumption of Momentum and collisions, esp conservation of linear momentum.
For some reason I stand to believe there are two diffirent equations for conservation of linear momentum Pbefore=Pafter. In one case we have
m1u1+m2u2 = m1v1m1v2
In the other we have
1/2m1u1^2 + 1/2m2u2^2 = 1/2m1v1^2 + 1/2m2v2^2
For some reson I stand to believe that they are for Perfectly inelastic collisions and Elastic collisions respectivly. Is this the case? Is there some "key word" in a work question that I can look for to say "Ah! I'm going to have use equation x"?
For some reason I stand to believe there are two diffirent equations for conservation of linear momentum Pbefore=Pafter. In one case we have
m1u1+m2u2 = m1v1m1v2
In the other we have
1/2m1u1^2 + 1/2m2u2^2 = 1/2m1v1^2 + 1/2m2v2^2
For some reson I stand to believe that they are for Perfectly inelastic collisions and Elastic collisions respectivly. Is this the case? Is there some "key word" in a work question that I can look for to say "Ah! I'm going to have use equation x"?