3. A truck-mounted crane in Figure 3 is moving a 1200-lbf concrete block on a construction site. The person at point B is helping the crane keep the block in static equilibrium before it is lowered to the ground. The frictionless connection ring at point C has a mass of 0.155 slugs and a = 24°. Calculate the magnitudes of the tension force in cable AC and the force the person applies through the rope BC. (Notice that the cable that connects the 1200-lbf weight to the connection ring is vertical.) OO OA 1200 lbf a B Figure 3 A person helping the crane balance a 1200-lbf block.

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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3. A truck-mounted crane in Figure 3 is moving a 1200-lbf concrete block on a
construction site. The person at point B is helping the crane keep the block in static
equilibrium before it is lowered to the ground. The frictionless connection ring at
point C has a mass of 0.155 slugs and a = 24°. Calculate the magnitudes of the
tension force in cable AC and the force the person applies through the rope BC.
(Notice that the cable that connects the 1200-lbf weight to the connection ring is
vertical.)
OA
1200 lbf
α
B
Figure 3 A person helping the crane balance a 1200-lbf block.
Transcribed Image Text:3. A truck-mounted crane in Figure 3 is moving a 1200-lbf concrete block on a construction site. The person at point B is helping the crane keep the block in static equilibrium before it is lowered to the ground. The frictionless connection ring at point C has a mass of 0.155 slugs and a = 24°. Calculate the magnitudes of the tension force in cable AC and the force the person applies through the rope BC. (Notice that the cable that connects the 1200-lbf weight to the connection ring is vertical.) OA 1200 lbf α B Figure 3 A person helping the crane balance a 1200-lbf block.
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Mass of ring = 0.155 slugs 

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