A Thin Uniform Rod (Length = 125 Cm,mass = 250

A thin uniform rod (length = 125 cm,mass = 250 g) is pivoted about a horizontal frictionless pin through one end of the rod.The moment of inertia of the rod through this axis is (1/3) mL².The rod is released when it is 20^o below the horizontal.What is the angular acceleration of the rod at the instant it is released?

A) 7.36 rad/s²
B) 14.7 rad/s²
C) 11.1 rad/s²
D) 22.1 rad/s²
E) 16.7 rad/s²

Correct Answer:

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