A Rock Is Whirled on the End of a String

question 9

Multiple Choice

A rock is whirled on the end of a string in a horizontal circle of radius R with a constant period T. If the radius of the circle is reduced to R/3, while the period remains T, what happens to the centripetal acceleration of the rock?

• A)The centripetal acceleration remains the same.
• B)The centripetal acceleration increases by a factor of 3.
• C)The centripetal acceleration increases by a factor of 9.
• D)The centripetal acceleration decreases by a factor of 3.
• E)The centripetal acceleration decreases by a factor of 9.

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Definitions:

Probate Court

A segment of the judiciary system that deals with matters such as the validation of wills, distribution of a deceased person's assets, and guardianships.

Beneficiaries

Individuals or entities entitled to receive benefits or assets from a trust, will, or insurance policy.

Principal of an Estate

The total assets of an estate before debts and liabilities are subtracted.

Major Repairs

Significant restorations or overhauls to property or equipment, intended to extend its useful life or enhance its value.