A 30-Kg Block Is on a Horizontal Surface

question 2

Multiple Choice

A 3.0-kg block is on a horizontal surface. The block is at rest when, at t = 0, a force (magnitude P = 12 N) acting parallel to the surface is applied to the block causing it to accelerate. The coefficient of kinetic friction between the block and the surface is 0.20. At what rate is the force P doing work on the block at t = 2.0 s?

• A) 54 W
• B) 49 W
• C) 44 W
• D) 59 W
• E) 24 W

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Definitions:

Dacryoma

A tumor of the lacrimal sac or gland, often related to the tear production system.

Chalazion

A small, usually painless, lump or swelling on the eyelid, caused by a blockage in one of the oil glands.

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An inflammatory condition affecting the eyelids, often associated with irritation, burning, and itching.

Blepharoptosis

A condition characterized by the drooping or falling of the upper eyelid.