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Q. A nylon tennis string on a racket is under a tension of 250N. If its diameter is 1.00 mm, by how much is it lengthened from its untensioned length of 30.0 cm?

Q. A certain string just breaks when it is under 400 N of tension. A boy uses this string to whirl a 10-kg stone in a horizontal circle of radius 10 m. The boy continuously increases the speed of the stone. At approximately what speed will the string break?

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Category:- Physics
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