Physics, 31.08.2019 03:10 handog12

Particle a moves along an axis in the laboratory with velocity v = 0.3c. particle b moves with velocity of v = .9c along the direction of motion of particle a.
what kinetic energy does the particle b measure for the particle a?

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Particle a moves along an axis in the laboratory with velocity v = 0.3c. particle b moves with veloc...