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The thin uniform rod in the figure has length 7.0 m and can pivot about a...

The thin uniform rod in the figure has length 7.0 m and can pivot about a horizontal, frictionless pin through one end. It is released from rest at angle θ = 40° above the horizontal. Use the principle of conservation of energy to determine the angular speed of the rod as it passes through the horizontal position. Assume free-fall acceleration to be equal to 9.83 m/s2.

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