A uniform rod (mass = 1.5 kg) is 2.0 m long. The rod is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest in a horizontal position. What is the angular speed of the rod when the rod makes an angle of 30° with the horizontal? (The moment of inertia of the rod about the pin is 2.0 kg×m2)
a. 2.2 rad/s
b. 3.6 rad/s
c. 2.7 rad/s
d. 3.1 rad/s
e. 1.8 rad/s
C
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