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The 3-kg slender rod rotated in a vertical plane about a

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The 3-kg slender rod rotated in a vertical plane about a pivot at B. A spring of constant k = 300 N/m and of unstretched length 120 mm is attached to the rod as shown in the figure. Knowing that in the position shown the rod has angular velocity of 4 rad/s clockwise; determine the angular velocity of  the rod after it has rotated through a 90°.

Reference no: EM13344576

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