How to calculate the extrema?
for example, When v10 < V < v20
From d(tanθ)/dθ10 < 0, how can get the solution 0 < θ < π ?
I can get it only when V2 = v10v20
In C system, total momentum is 0
it is just m1v10+m2v20 = 0
In L system, v1=v10+V, v2=v20+V, and total momentum is not 0
The particles we looking at are in L system.
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Mechanics by Lev D. Landau & E. M. Lifshitz
Chapter 4 Collisions between particles
§16. Disintegration of particles
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The angle θ = θ1 + θ2
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