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

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 $\mathrm { kg } \cdot \mathrm { m } ^ { 2 }$ 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 th string does not slip on the pulley. How fast is the upper block moving when the lower one has fallen 0.60 m?

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