As Shown in the Figure, Two Blocks Are Connected by a Light

question 113

Multiple Choice

As shown in the figure, two blocks are connected by a light string that passes over a frictionless pulley having a moment of inertia of 0.0040 kg ∙ m² and diameter 10 cm. The coefficient of kinetic friction between the table top and the upper block is 0.30. The blocks are released from rest, and the string does not slip on the pulley. How fast is the upper block moving when the lower one has fallen 0.60 m?

• A) 1.2 m/s
• B) 5.4 m/s
• C) 3.2 m/s
• D) 2.0 m/s
• E) 1.4 m/s

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