Problem: How fast must a spacecraft travel relative to the earth for each day on the earth to correspond to 2 days on the earth?(adsbygoogle = window.adsbygoogle || []).push({});

My solution:

proper time = 1 day = 86400 seconds

time on space craft= 2 days= 172800 seconds

relavant equation: t=t(0)/(sqrt(1-v^2/c^2)

I would plug in both the proper time and relative time into time dilation equation in order to find the speed of the spacecraft correct?

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# Homework Help: Time dilation spacecraft travel problem

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