Question

A disk whose rotational inertia is 450 kgm2hangs from a wire whose torsion constant is 2300 Nm/rad. When its angular displacement is -0.23 rad, what is its angular acceleration?
A) 1.0 x 10-2rad/s2
B) 4.5 x 10-2rad/s2
C) 0.23 rad/s2
D) 0.52 rad/s2
E) 1.2 rad/s2

Answer

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