Practice: A chandelier is supported from the ceiling by 2 chains. Both chains make a 30° angle with the vertical. The tension in each chain is the same because of symmetry: T1=T2=50 N. What is the mass of the chandelier?
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Concept #1: 2D Equilibrium Problems
Example #1: Traffic Signal
Practice: A sphere hangs suspended by a light string, resting against a vertical wall. The sphere has a mass of 2 kg and the string makes an 80° angle with the horizontal. What is the force from the wall against the ball?
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