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The base of an automobile jackstand forms an equilateral triangle of side length 10 in. and is centered under the collar A. Model the structure as one with a ball and socket at each joint and determine the force in members BC, BD, and CD. Neglect any horizontal reaction components under the feet B, C, and D.

4.
The base of an automobile jackstand forms an equilateral triangle of side length 10 in. and is centered under
the collar A. Model the structure as one with a ball and socket at each joint and determine the force in
members BC, BD, and CD. Neglect any horizontal reaction components under the feet B, C, and D.
800 lb
16"
10"

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