A Certain String Just Breaks When It Is Under 25

question 20

Multiple Choice

A certain string just breaks when it is under 25 N of tension. A boy uses this string to whirl a 0.75-kg stone in a horizontal circle of radius 2.0 m. The boy continuously increases the speed of the stone. At approximately what speed will the string break?

• A)6.4 m/s
• B)8.2 m/s
• C)12 m/s
• D)15 m/s
• E)18 m/s

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A global conflict that lasted from 1914 to 1918, involving many of the world's great powers, characterized by trench warfare and massive casualties.

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A global conflict that lasted from 1939 to 1945, involving most of the world's nations and marked by significant events like the Holocaust and the use of atomic bombs on Japan.

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