# physics

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It has been suggested that rotating cylinders about 9 mi long and 5.1 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth?

• physics -

please omit this question, I have solved it on my own. THANKS!!!

w=sqrt(g/r)
r=d/2
r=5.1/2
r=2.55
r=4103.8272
w=sqrt(9.8/4103.8272)

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