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special relativity problem

Hi, im just wondering if anyone could help me with the following problem, for the length in the trains interval i got 80m, its just the next parts that im struggling withrelativity.png
Reply 1
i've managed to do the first two parts of b, im just unsure where to go with iii and iv, the lorentz factor i calculated was 1.25 any help would be appreciated
The first part, B I) can be thought of by asking a rather simple question.
What is the airspeed velocity of an unladen swallow?

Spoiler

Reply 3
Original post by Marcus2016
The first part, B I) can be thought of by asking a rather simple question.
What is the airspeed velocity of an unladen swallow?

Spoiler



haha

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