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Determine the moment of the 20-lb force about the point O. Sec Fig. 2-3.

Determine the moment of the 20-lb force about the point O. Sec Fig. 2-3.

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Subject: Statics of Rigid Bodies

2.1. Determine the moment of the 20-lb force about the point O. Sec Fig. 2-3. SOLUTION Drop the perpendicular OD from O to the action line of the 20-lb force. Its length to scale is 4.33 ft. The moment of the force about 0 (actually about an axis through O perpendicular to the xy plane) is therefore -(20 x 4.33) = -86.6 lb-ft.
Transcribed Image Text:2.1. Determine the moment of the 20-lb force about the point O. Sec Fig. 2-3. SOLUTION Drop the perpendicular OD from O to the action line of the 20-lb force. Its length to scale is 4.33 ft. The moment of the force about 0 (actually about an axis through O perpendicular to the xy plane) is therefore -(20 x 4.33) = -86.6 lb-ft.
60° 20 Ib 5' 90e Fig. 2-3
Transcribed Image Text:60° 20 Ib 5' 90e Fig. 2-3
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