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

question 41

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 by the air on the plane?

• A)-2.70 × 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:

Optic Disc

Point at which axons of ganglion cells of the retina converge to form the optic nerve, which then penetrates through the fibrous tunic of the eye.

Posterior Chamber

Chamber of the eye between the iris and the lens.

Lens

A transparent, flexible optical element in the eye that focuses light onto the retina, allowing for clear vision.

Cornea

The eye's outermost, transparent layer, which covers the iris and pupil and helps focus incoming light.