An Airplane Flies 120 Km at a Constant Altitude in a Direction

question 38

Multiple Choice

An airplane flies 120 km at a constant altitude in a direction 30.0° north of east. A wind is blowing that results in a net horizontal force on the plane due to the air of 2.40 kN in a direction 10.0° south of west. How much work is done on the plane by the air?

• A) -2.71 × 10⁸ J
• B) -0.985 × 10⁸ J
• C) -221 × 10⁸ J
• D) 221 × 10⁸ J
• E) 0.821 × 10⁸ J

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Definitions:

Cohort Effect

A phenomenon in which research outcomes are influenced by the characteristics of the cohort being studied, often related to the group's unique social or historical context.

Eras

Distinct periods of time identified by specific characteristics, events, or developments.

Ages

A term referring to the different stages of life or periods in history, often used in the study of human development or demographics.

Selective Attrition

The process by which participants drop out of a study over time, not randomly, potentially biasing the results.