An Atwood Machine Consists of a Mass of 3 $\mathrm { kg } \cdot \mathrm { m } ^ { 2 }$

Multiple Choice

An Atwood machine consists of a mass of 3.5 kg connected by a light string to a mass of 6.0 kg over a frictionless pulley with a moment of inertia of 0.0352 $\mathrm { kg } \cdot \mathrm { m } ^ { 2 }$ and a radius of 12.5 cm. If the system is released from rest, what is the speed of the masses after they have moved through 1.25 m if the string does not slip on the pulley?

A) 4.0 m/s
B) 2.0 m/s
C) 2.3 m/s
D) 6.0 m/s
E) 5.0 m/s