The uniform 30-kg bar OB is secured to the accelerating frame in the 30° position from the horizontal by the hinge at O and roller at A. If the horizontal acceleration of the frame is a = 20 m/s², compute the force FA on the roller and the x- and y-components of the force supported by the pin at O.

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B, 3000 mm 1000 30° mm y A a L-->