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Old Jul 11th 2017, 11:19 AM   #1
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Man in a rotating spaceship

A spaceman, who weighs 75 kg on the Earth, is in a room of a spaceship that is rotating around the axis through the centre of the spaceship with angular speed $\displaystyle \omega = 0,5 rad/s$. The spaceman is on a weight scale and he sees that he weighs 70 kg. At what distance he is from the axe of rotation?
How can I deal with this problem? I don't know what formula use!
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Old Jul 11th 2017, 12:41 PM   #2
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Basic formula (as often the case) is: $\displaystyle F = m a$

For a rotating frame with constant angular velocity the value of acceleration is $\displaystyle a =r \omega^2 $. You have values for m, F, and $\displaystyle \omega$, so you should be able to solve for r.
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Old Jul 12th 2017, 02:59 AM   #3
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Thank you!
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