A 12,000-kg airplane is in level flight at a speed of 870 km/h. What is the upward-directed liftforce exerted by the air on the airplane?

Question

A 12,000-kg airplane is in level flight at a speed of 870 km/h. What is the upward-directed liftforce exerted by the air on the airplane?
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Solution 1

To solve this problem, we need to understand that in level flight, the lift force (F) exerted by the air on the airplane is equal to the weight (W) of the airplane. The weight of an object is its mass (m) times the acceleration due to gravity (g).

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