A certain string just breaks when it is under 23.2 N of tension. A boy uses this string to whirl a 1.2 kg stone in a horizontal circle of radius 3.3 m. The boy continuously increases the speed of the stone. At approximately what speed will the string break?

Glencoe Physics: Principles and Problems, Student Edition
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ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter11: Energy And Its Conservation
Section: Chapter Questions
Problem 43A
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A certain string just breaks when it is under 23.2 N of tension. A boy uses this string
to whirl a 1.2 kg stone in a horizontal circle of radius 3.3 m. The boy continuously
increases the speed of the stone. At approximately what speed will the string break?
Transcribed Image Text:A certain string just breaks when it is under 23.2 N of tension. A boy uses this string to whirl a 1.2 kg stone in a horizontal circle of radius 3.3 m. The boy continuously increases the speed of the stone. At approximately what speed will the string break?
A 1291.9 kg car travels at a constant speed of 22.5 m/s around a circular track
that is 86.7 m across. What is the kinetic energy of the car?
Transcribed Image Text:A 1291.9 kg car travels at a constant speed of 22.5 m/s around a circular track that is 86.7 m across. What is the kinetic energy of the car?
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