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47. A piece of wood 1 ft square and 10 ft long, weighing 40 Ib per cu. Ft, is submerged vertically in a body of water; its upper end being flushed with the water surface. What vertical force is required to hold it in position? a. 120 Ibs b. 210 Ibs c. 624 Ibs d. 224 Ibs

47. A piece of wood 1 ft square and 10 ft long, weighing 40 Ib per cu. Ft, is submerged vertically in a body of water; its upper end being flushed with the water surface. What vertical force is required to hold it in position? a. 120 Ibs b. 210 Ibs c. 624 Ibs d. 224 Ibs

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47. A piece of wood 1 ft square and 10 ft long, weighing 40 Ib per cu. Ft, is submerged vertically in a body of water; its upper end being flushed with the water surface. What vertical force is required to hold it in position? a. 120 Ibs b. 210 Ibs c. 624 Ibs d. 224 Ibs a В O c d
Transcribed Image Text:47. A piece of wood 1 ft square and 10 ft long, weighing 40 Ib per cu. Ft, is submerged vertically in a body of water; its upper end being flushed with the water surface. What vertical force is required to hold it in position? a. 120 Ibs b. 210 Ibs c. 624 Ibs d. 224 Ibs a В O c d
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