The light bar AD is attached to collars B and C that can move freely on vertical rods
Chapter 4, Problem 4.101(choose chapter or problem)
The light bar AD is attached to collars B and C that can move freely on vertical rods. Knowing that the surface at A is smooth, determine the reactions at A, B, and C (a) if \(\alpha = 60^{\circ}\), (b) if \(\alpha = 90^{\circ}\).
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