An Airplane Is Flying in Horizontal Flight at a Constant

question 27

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 wings. 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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Definitions:

Stepwise Modification

A methodical approach to changing behavior or processes through small, incremental adjustments rather than drastic changes.

Alternating Treatments Design

An experimental design used in research to compare the effectiveness of two or more treatments by applying them alternately in quick succession.

Behavior Change

The transformation or modification of human behavior using various psychological methods, including conditioning.

Sequence Effects

The impact that the order of presenting treatments or stimuli has on the subject's behavior or responses in an experiment.