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Q. Billy has a bucket that has a mass of 150 g, in which he put 150 g of fresh water. He has tied 150-cm of string to the handle of the bucket (assume the length of string necessary to tie it on equals the length of bucket and its bail) and is swinging it around his head in a circle at 60 revolutions per minute. What is the centrifugal force pulling on the string?

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