A System Comprised Blocks, a Light Frictionless Pulley, and Connecting

question 36

Multiple Choice

A system comprised blocks, a light frictionless pulley, and connecting ropes is shown in the figure. The 9.0-kg block is on a perfectly smooth horizontal table. The surfaces of the 12-kg block are rough, with µ_k = 0.30 between the block and the table. If the 5.0-kg block accelerates downward when it is released, find its acceleration.

• A) 1.0 m/s²
• B) 1.2 m/s²
• C) 1.4 m/s²
• D) 1.6 m/s²
• E) 1.8 m/s²

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Definitions:

Parasympathetic

Referring to the part of the autonomic nervous system that conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles.

Somatic

Relating to, or affecting the body, especially as distinguished from the mind or consciousness.

Endorphins

Natural, pain-relieving chemicals produced by the body that also contribute to feelings of pleasure and well-being.

Dopamine

A neurotransmitter involved in the regulation of movement, attention, learning, mood, and motivation.