# Problem: A muon has a momentum of 4.0x10 -19 Ns. If the rest mass of the muon is 1.8x10 -28 kg, what is the muon's kinetic energy?

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###### Problem Details

A muon has a momentum of 4.0x10 -19 Ns. If the rest mass of the muon is 1.8x10 -28 kg, what is the muon's kinetic energy?