I have problems with some excercises before my exam on friday. plz help me(adsbygoogle = window.adsbygoogle || []).push({});

1) A charged pimeson has a lifetime of t=2,6*10^-8 s in its resting system.

a) How far distance L does it travel inInrelastvisticmechanics?If itskinetic energy is 700 MeV?

b) How far distance L0 (seen by observator in laboratoriesystem) does it go by relativistik mechaniks?

Pimesons mass is140 MeV/c^2.

I get a to be 20 m using 700 = 1/2*mv^2 but i don't get b. Anyone that can solve it?

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# Homework Help: Problems with relativity

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