A Sphere Is Dropped from a Great Height and When

question 1

Multiple Choice

A sphere is dropped from a great height and when its speed reaches 20 m/s,its acceleration downward is 8.4 m/s².If the drag force is proportional to the square of the speed,what will be its acceleration downward when its speed reached 40 m/s?

• A) 2.6 m/s²
• B) 4.2 m/s²
• C) 8.0 m/s²
• D) 0 m/s² because it has now reached terminal velocity.

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Definitions:

Charles Derber

A contemporary American sociologist known for his research and writings on social movements, corporate power, and environmental issues.

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