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

question 979

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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