Multiple Choice
A helicopter stays aloft by pushing large quantities of air downward every second.What mass of air must be pushed downward at 35.0 m/s every second to keep a 1 500-kg helicopter aloft?
A) 42.9 kg
B) 420 kg
C) 430 kg
D) 410 kg
E) 415 kg
Correct Answer:
Verified
Correct Answer:
Verified
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