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) \(52 \mathrm { mi } / \mathrm { h }\)

Understand the basic structure and function of the nervous system, including the distinctions between different types of neurons and neural signals.

Identify the major parts of the brain and their functions, including the limbic system, cerebral cortex, and their subdivisions.

Describe the role and function of glial cells in the nervous system.

Recognize the role of neurotransmitters and how drugs can affect neurotransmitter activity.

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