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Special Relativity ?



This is a question of momentum as seen from two reference frames S and S'.
S' is moving at 0.5c rel to S. S observes two bodies approaching each
other so that he measures the speed of each to be 0.5c one parallel to
the motion of S', the other directly opposed. One rest mass is twice the
other. The two hit
and somehow stick together. ( Is that conceivable in this thought
experiment?)

Using expressions for relativistic momentum p = gamma m v we came up with
a reasonable answer for the velocity of the combined mass. Of course S' is
supposed to agree that momentum is conserved. New values but conservation
none the less. Using the velocity transformantion equations and momentum
equations, I am unable to show that as a fact.

As you can tell I am a novice but a fascinated one and one who believes he
is making progress in understanding. But I am baffled. Any guidance would
be wonderful.

Thanks!

Ken Fox
Smoky Hill High School
16100 Smoky Hill Rd
Aurora,CO 80015
303-693-1700(w)
303-850-7537(H)
kfox@stega.smoky.org