The Total Force Needed to Drag a Box at Constant

question 2

Multiple Choice

The total force needed to drag a box at constant speed across a surface with coefficient of kinetic friction μ_k is least when the force is applied at an angle θ such that

• A) sinθ = μ_k.
• B) cosθ = μ_k.
• C) tanθ = μ_k.
• D) cotθ = μ_k.
• E) secθ = μ_k.

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Definitions:

Island Arcs

Curved chains of volcanic islands that are usually situated along the edge of a tectonic plate, created by the subduction of an oceanic plate beneath another plate.

Island Arcs

Curved chains of volcanic islands that form along the boundaries of Earth's tectonic plates, generally over a subducting plate.

Mid-ocean Ridge

An underwater mountain range, formed by plate tectonics, that encircles the globe and is the site of new oceanic crust formation.

Terranes

Geologically distinct regions that may have been brought together by past tectonic processes.