A Uniform Rod (Mass = 1

question 4

Multiple Choice

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

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