Question: The A-frame is being hoisted into an upright position by the vertical force of F = 80 lb. Determine the moment of this force about

The A-frame is being hoisted into an upright position by the vertical force of F = 80 lb. Determine the moment of this force about the x axis when the frame is in the positionshown.

15 6 t 30 ft

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Using x y z u cos 30 i sin 30 J FAC 6 cos 15 1 3 J 6 sin 15 k F 80 k COS ... View full answer

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