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5.9 Exercise 51

Avg difficulty 2.5

What is the kinetic energy in MeV of a π-meson that lives 1.40×10−16s1.40 \times 1 0^{−16} \text{s} as measured in the laboratory, and 0.840×10−16s0.840 \times 1 0^{−16} \text{s} when at rest relative to an observer, given that its rest energy is 135 MeV?

OpenStax University Physics Volume 3, 5.9 Relativistic Energy, exercise 51

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Adapted from University Physics Volume 3 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 3. Imported at revision db44eb9.