Calculate the relativistic energy of a 0.2 kg mass moving at 0.9c.
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A: Solution:-Given thatmass of person (m)=93.9 kgspeed of person (v)=0.994cc=speed of light=3×108 m/s
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A: From Length's contraction: L= L01-v2c2 L= 251-0.992c2 L= 25×0.141= 3.5 m
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