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At the instant of picture shown, the 6 kg bar is at rest. The unstretched spring (spring constant of 90 N/m) is attached to

At the instant of picture shown, the 6 kg bar is at rest. The unstretched spring (spring constant of 90 N/m)

At the instant of picture shown, the 6 kg bar is at rest. The unstretched spring (spring constant of 90 N/m) is attached to its end so, that is always remains vertical due to the frictionless roller at C. When the bar released, it started rotate clockwise. Solve the angular velocity of the bar the instant it has rotated 30 clockwise. 1,0 m HHHH

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