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Aliza29faye
 one year ago
DC 10 Jet liner is flying straight and level at 21,000 feet at a constant speed of 600 miles/hour. The engines are delivering a combined thrust of 100,000 lbs. What must the drag force of air be?
a. _____________
The aircraft with its passangers and cargo weighs 500,000 lbs. What is the total lift force acting upward on the plane to keep it in the air?
b. ________________
Aliza29faye
 one year ago
DC 10 Jet liner is flying straight and level at 21,000 feet at a constant speed of 600 miles/hour. The engines are delivering a combined thrust of 100,000 lbs. What must the drag force of air be? a. _____________ The aircraft with its passangers and cargo weighs 500,000 lbs. What is the total lift force acting upward on the plane to keep it in the air? b. ________________

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ghere , let the drag force by air is Fd as the plane is moving with constant velocity net force on the plane will be zero Fd  100000 = 0 Fd = 100,000 lbf the drag force is 100,000 lbf b) as the plane is at constant height Flift  W = 0 Flift  500,000 = 0 Flift = 500,000 lbf the total lift force acting upward on the plane to keep it in the air is 500,000 lbf
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