A 60-Kg Block Slides Along a Horizontal Surface

question 10

Multiple Choice

A 6.0-kg block slides along a horizontal surface. If µk = 0.20 for the block and surface, at what rate is the friction force changing the mechanical energy of the block at an instant when its speed is 4.0 m/s?

• A)−59 W
• B)−47 W
• C)−71 W
• D)−82 W
• E)+71 W

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Definitions:

Body Movement

The physical movement involving parts or the whole body, often used as a form of non-verbal communication.

Territorial Space

Bands of concentric space radiating outward from the body.

Social Distance Zone

A concept in proxemics referring to the physical distance individuals prefer to maintain in social interactions to feel comfortable.

Personal Distance Zone

A spatial zone commonly reserved for interactions among good friends or family members, reflecting cultural or personal preferences for physical proximity.