A uniform rod of length (L = 2.0 m) and mass (M = 1.5 kg) is pivoted about a horizontal frictionless pin through one end. The rod is released from rest at an angle of 30° below the horizontal. What is the angular speed of the rod when it passes through the vertical position? (The rotational inertia of the rod about the pin is 2.0 kg/m2.)

a. 3.5 rad/s
b. 2.7 rad/s
c. 3.1 rad/s
d. 2.3 rad/s
e. 1.6 rad/s


b

Physics & Space Science

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