An 80-Cm Radius Disk with a Rotational Inertia of 0

question 76

Multiple Choice

An 8.0-cm radius disk with a rotational inertia of 0.12 kg.m² is free to rotate on a horizontal axis.A string is fastened to the surface of the disk and a 10-kg mass hangs from the other end.The mass is raised by using a crank to apply a 9.0-N.m torque to the disk.The acceleration of the mass is:

• A)0.50 m/s²
• B)3.9 m/s²
• C)6.0 m/s²
• D)12 m/s²
• E)20 m/s²

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