A 18-Kg Block Is Projected Up a Rough 10° Inclined Plane

question 73

Multiple Choice

A 1.8-kg block is projected up a rough 10° inclined plane. As the block slides up the incline, its acceleration is 3.8 m/s² down the incline. What is the magnitude of the force of friction acting on the block?

• A) 5.0 N
• B) 3.8 N
• C) 4.2 N
• D) 4.6 N
• E) 6.5 N

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Definitions:

Drive-Reduction Theory

A concept in psychology that explains motivation as a mechanism to reduce an internal state of tension caused by unmet needs.

Drives

Basic, biological impulses that motivate behavior, such as hunger or thirst, pushing organisms to fulfill their needs.

Sensation Seeker

An individual who seeks novel, complex, and intense experiences and sensations, often taking physical and social risks to achieve these experiences.

Schachter

Stanley Schachter, an American psychologist known for his development of the Two-Factor Theory of Emotion, which emphasizes the role of cognitive labeling in the experience of emotions.