A Box of Mass M Is Placed on an Incline

question 43

Multiple Choice

A box of mass m is placed on an incline with angle of inclination . The box does not slide. The magnitude of the frictional force in this case is:

• A) " Mg sin ."
• B) "mg cos ."
• C) "mg sin ."
• D) "not given."

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Definitions:

Equilibrium

A state of balance between opposing forces or actions.

Asthenosphere

The area of mantle beneath the lithosphere that is solid, but hotter than the rock above it and can flow under pressure; functions as a soft, weak zone over which the lithosphere may move.

Crustal Blocks

These are large areas of the Earth's crust that have moved together or apart due to tectonic activity.

Isostatic Adjustment

The equilibrium adjustment of the Earth's crust due to changes in load (such as the melting of glaciers), affecting the crust's vertical movement.