a. A rocket is traveling at 0.25c. How fast must it go in order to increase its momentum by a factor of 5? ? x c

Physics for Scientists and Engineers
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Chapter38: Relativity
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Problem 28P: (a) Find the kinetic energy of a 78.0-kg spacecraft launched out of the solar system with speed 106...
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a. A rocket is traveling at 0.25c. How fast must it go in order to increase its momentum by a factor of 5?

? x c

b. If an object's kinetic energy is 12% of its rest energy, how fast is it going?

? x c

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