Solve. See Example 7.When a wind blows perpendicularly
Chapter 6, Problem 42(choose chapter or problem)
Solve. See Example 7.When a wind blows perpendicularly against a flat surface,its force is jointly proportional to the surface area and thespeed of the wind. A sail whose surface area is 12 squarefeet experiences a 20-pound force when the wind speed is10 miles per hour. Find the force on an 8-square-foot sail ifthe wind speed is 12 miles per hour.
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