Determine the speed of the spaceship

Reference no: EM13337081

a) The length of a moving spaceship is 27.0 m according to an astronaut on the spaceship. If the spaceship is contracted by 14.5 cm according to an Earth observer, what is the speed of the spaceship?

b) A star is 5.60 ly from the Earth. At what speed must a spacecraft travel on its journey to the star such that the Earth-star distance measured in the frame of the spacecraft is 2.80 ly?

Reference no: EM13337081

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