A helicopter stays aloft by pushing large quantities of air downward every second.What mass of air must be pushed downward at 40.0 m/s every second to keep a 1 000-kg helicopter aloft?
A)120 kg
B)245 kg
C)360 kg
D)490 kg

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The Answer of A helicopter stays aloft by pushing large quantities of air downward every second.What mass of air must be pushed downward at 40.0 m/s every second to keep a 1 000-kg helicopter aloft?
A)120 kg
B)245 kg
C)360 kg
D)490 kg

A Helicopter Stays Aloft by Pushing Large Quantities of Air