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a 2kg weight is tied to the end of a piece of string of length L=7m...

a 2kg weight is tied to the end of a piece of string of length L=7m and then whirled around in a horizontal cirlce at ever increasing angular velocity w until the string breaks when w = 3rad/sec, and the weight flies off at a tangent

a.)What is the speed v of the weight when this happens

b.)what is the breaking strain of the string?(ie. what is the tension when the string breaks?)

c.) if a new piece of string is used with twice the breaking strain of the first piece, what is the new maximum angular velocity w of the 2kg weight before the string breaks?

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