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In the diagram given below, coordinates of D is (1, -2, 2), C (-2, 0, 0) and B are as shown. The dark region is the cables holding the weight of 600N at origin. Find the tension in the AD section.

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In the diagram given below, coordinates of D is (1, -2, 2), C (-2, 0, 0) and B are as shown. The dark region is the cables holding the weight of 600N at origin. Find the tension in the AD section.

(a) 900N

(b) 693N

(c) 646N

(d) 0N

The question was asked in final exam.

My doubt is from Cables Subjected to its Own Weight in portion Internal Forces of Engineering Mechanics

1 Answer

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Right answer is (a) 900N

The explanation: As the system is in equilibrium so we need to balance the forces. So when apply the condition of net force to be zero in the z direction, we get (2/3)FAD = 600N. This gives us force along AD be 900N.

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