How Much Air Must Be Pushed Downward at 40

question 64

Multiple Choice

How much air must be pushed downward at 40.0 m/s to keep an 800-kg helicopter aloft?

• A) 20 kg/s
• B) 196 kg/s
• C) 32 000 kg/s
• D) 201 kg/s
• E) ​186 kg/s

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