A String Is Wrapped Around a Pulley with a Radius

question 19

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

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