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5.3 Exercise 11

Avg difficulty 2.5

A neutral π\pi-meson is a particle that can be created by accelerator beams. If one such particle lives 1.40×10−16s1.40 \times 10^{−16} \text{s} as measured in the laboratory, and 0.840×10−16s0.840 \times 10^{−16} \text{s} when at rest relative to an observer, what is its velocity relative to the laboratory?

OpenStax University Physics Volume 3, 5.3 Time Dilation, exercise 11

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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.