The Magnitude of the Drag Force of Air Resistance on a Certain

question 13

Multiple Choice

The magnitude of the drag force of air resistance on a certain 20.0-kg object is proportional to its speed. If the object has a terminal speed 80.0 m/s, what is the magnitude of the drag force on the object when it is falling with a speed 30.0 m/s?

• A) 196 N
• B) 7.50 N
• C) 15.0 N
• D) 73.5 N
• E) 42.7 N

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Definitions:

Vowel

A letter of the alphabet representing a speech sound made without significant constriction of the flow of air from the lungs.

Combining Forms

Parts of words (often derived from Greek or Latin) that carry specific meanings and are used in the construction of medical and scientific terminology.

Suffix

A linguistic element added to the end of a word to form a derivative or change its grammatical function.

Consonant

A speech sound produced by partially or completely obstructing the flow of air through the vocal tract, characterized by less resonance and more restriction than vowels.