A Disk Whose Rotational Inertia Is 450 Kg∙m² Hangs from a Wire

question 64

Multiple Choice

A disk whose rotational inertia is 450 kg∙m² hangs from a wire whose torsion constant is 2300 N∙m/rad.When its angular displacement is −0.23 rad, what is its angular acceleration?

• A)1.0 x 10^-2 rad/s²
• B)4.5 x 10^-2 rad/s²
• C)0.23 rad/s²
• D)0.52 rad/s²
• E)1.2 rad/s²

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