A String Is Wrapped Around a Pulley with a Radius

Multiple Choice

A string is wrapped around a pulley with a radius of 2.0 cm. The pulley is initially at rest. A constant force of 50 N is applied to the string, causing the pulley to rotate and the string to unwind. If the string unwinds 1.2 m in 4.9 s, what is the moment of inertia of the pulley?

A) 0.17 kg∙m²
B) 17 kg∙m²
C) 14 kg∙m²
D) 0.20 kg∙m²
E) 0.017 kg∙m²