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April 21, 2014

Homework Help: Physics

Posted by CR on Sunday, February 20, 2011 at 9:57pm.

A string under a tension of 48 N is used to whirl a rock in a horizontal circle of radius 2.4 m at a speed of 18.48 m/s. The string is pulled in, and the speed of the rock increases.
When the string is 1.076 m long and the speed of the rock is 49.4 m/s, the string breaks. What is the breaking strength of the string?
Answer in units of N.

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