A Car Is Traveling on a Curve That Forms a Circular

question 76

Multiple Choice

A car is traveling on a curve that forms a circular arc. The force F needed to keep the car from skidding is jointly proportional to the weight $\text {W }$
Of the car and the square of its speed s, and is inversely proportional to the radius r of the curve. A car weighing 2,500 lbs travels around a curve at 70 mi/h. The next car to round this curve weighs 4,900 lbs and requires the same force as the first car to keep from skidding. How fast is the second car traveling?

• A) \(49 \mathrm { mi } / \mathrm { h }\)
• B) \(50 \mathrm { mi } / \mathrm { h }\)
• C) \(44 \mathrm { mi } / \mathrm { h }\)
• D) \(54 \mathrm {~min}\)
• E) \(52 \mathrm { mi } / \mathrm { h }\)

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Definitions:

Legitimacy of New Nation

The recognition and acceptance by the international community and its own citizens of a newly established country's sovereignty and governance.

Foreign Governments

The governing bodies of nations other than one's own, with which diplomatic, economic, and political relations may be engaged.

Separation of Powers

A model for governance that divides the state's powers into distinct branches to prevent any one branch from gaining too much power.

Constitution

The fundamental principles and established precedents according to which a state or other organization is governed.