Moving clocks and time dialation question

AI Thread Summary
The discussion revolves around calculating the maximum velocity for a clock traveling from London to New York, ensuring the time difference compared to a stationary clock is less than 10^-8 seconds. The original poster attempted to use the time dilation formula t=t'y and arrived at a velocity of 1/3c, which they believe is too high. Participants are encouraged to share their methods for arriving at this velocity and to provide insights on the calculations involved. The conversation emphasizes the challenge of solving this problem without the use of calculators. Overall, the thread seeks clarification on time dilation effects in practical scenarios.
phja
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i'm revising for an exam and have this question posed (this isn't homework)

what is the maximal velocity for a clock being transported from london to new york if the time difference to a stationary clock should be less than 10^-8 seconds.

i'm not allowed to use calculators.

i've tried doing it by t=t'y, but get a velocity of 1/3c, which i think is much too high. anyone have any ideas?

thanks.
 
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care to show how you got the 1/3c?
 
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