Question: The four-member A frame is supported at A and E by smooth collars and at G by a pin. All the other joints are ball-and-sockets.

The four-member "A" frame is supported at A and E by smooth collars and at G by a pin. All the other joints are ball-and-sockets. If the pin at G will fail when the resultant force there is Fmax, determine the largest vertical force P that can be supported by the frame. Also, what are the x, y, z force components which member BD exerts on members EDC and ABC? The collars at A and E and the pun at G only exert force components on the frame. Given:

Fmax = 800 N

a = 300 mm

b = 600 mm

c = 600 mm

The four-member

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