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ifos โ€ข paper_1 โ€ข mechanics

[UPSC IFoS 2021] Special Theory of Relativity (Q337, 13M)

A pion at rest decays into a muon and a neutrino.

Physics Diagram ifos-q-1-098-fig-1

(i) Find the energy of the outgoing muon in terms of the two masses m_\pi and m_\mu (assuming m_\nu = 0). (ii) Find the velocity of muon.

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