An Airplane Is Flying in Horizontal Flight at a Constant

question 66

Multiple Choice

An airplane is flying in horizontal flight at a constant velocity.The weight of the airplane is 40,000 N.The wings produce a lift force that is perpendicular to the wings and a drag force that is parallel to the wing.The engine produces a forward thrust force of 2,000 N.Which of the following statements is true?

• A) the net force on the airplane is zero
• B) the net force on the airplane is forward
• C) the net force on the airplane is upward
• D) the net force on the airplane is downward
• E) the net force on the airplane is backward

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