Problem 1.6.1
Consider the totally new structure of rigid beams shown below:
![](https://media.cheggcdn.com/media/f77/f77d5fb0-9eb2-440a-9a95-d6290fc17324/phpMfe1Qm)
![student submitted image, transcription available below](https://media.cheggcdn.com/media/404/404945c9-5182-4e19-99d4-123b4dba8532/phpUPuyT2)
a) Is this system as a whole externally statically determinate, underdeterminant, or indeterminant? What about the system of the grey beam alone?
b) if possible, determine the reaction forces and moments at A; otherwise, state why it's impossible.
c) if possible, determine the reaction forces and moments at B; otherwise, state why it's
impossible.
A is a fixed support to the ground at the origin, point B refers to the slider joint (location of the frictionless orange pins) at rB?=?0,0.5,0?m and the cable connects point C at rC?=?1.25,0.55,0? to point C at rD?=?0.05,1.3,0?. Three external forces are applied to the grey beam (which is attached via the slider to the gold beam): F1?=?.2,?.4,+4?N at r1?=?1.1,0.48,0.02?m,F2?=?2,3,?0.4?N at r2?=?.4,.55,?.02?m, and F3?=?0,?5,0?N at r3?=?.6,.45,0?m?