A Brick Is Resting on a Rough Incline as Shown

question 20

Multiple Choice

A brick is resting on a rough incline as shown in the figure. The friction force acting on the brick, along the incline, is

• A) zero.
• B) equal to the weight of the brick.
• C) greater than the weight of the brick.
• D) less than the weight of the brick.

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Definitions:

Detritus Food Chain

A series of processes by which nutrients are recycled in an ecosystem, starting from organic waste and decomposing organisms to detritivores and then to their predators.

Decaying Matter

Organic material that is breaking down through the process of decomposition by microorganisms.

Grazing Food Chain

A flow of energy to a straight-line linking of organisms according to who eats whom.

Photosynthetic Organisms

Organisms that convert light energy into chemical energy through the process of photosynthesis, including plants, algae, and certain bacteria.