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If a 100 kg man is moving at 90 percent of the speed of light. What is his mass as observed by a stationary frame of reference?
Wiki User
∙ 11y ago
m = m0 / sqrt(1-v^2/c^2)
m = 100 kg / (1 - (0.9c)^2/c^2)
m = 100 kg / 0.43589
m = 229.4 kg
Wiki User
∙ 11y ago
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