A Car Is Traveling on a Curve That Forms a Circular

question 30

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 mi/h
• B) 50 mi/h
• C) 44 mi/h
• D) 54 mi/h
• E) 52 mi/h

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Definitions:

Circulatory System

The body's system responsible for the movement of blood and lymph, carrying nutrients and oxygen to cells while removing waste products.

Oxygen

A chemical element essential for life, commonly found in the Earth's atmosphere, and a key component of water and organic compounds.

Upper Respiratory System

The part of the respiratory system that includes the nose, nasal passages, pharynx, and larynx, involved in breathing and speech.

Paranasal Sinuses

Air-filled spaces around the nasal cavity that help warm, moisten, and filter the air breathed in through the nose.