oh ok i just realized i made a fundamental conceptual error. i always thought Newton's third law meant that reaction forces have to act perpendicularly from the wall through the point, but it just means reaction force is always equal and opposite to the force acting on it.
in this case, the...
yeah that's what I thought, it's the only possible force that will balance out the horizontal components. So do you mean that since the overall structure is acting on the wall at about 67degrees from the vertical downwards, the reaction force from the wall acting on the point itself is the...
Ok.. but what do you call the upward force acting at P5 if it does exist? Is it friction or just a vertical component of another force acting in the "2 o'clock" direction? That is my dilemma because I don't know what to name and how to define it.
Secondly, the tension force from P3P5 does act...
Homework Statement
I spent a few hours trying out this question, so I probably need help. This is a seven pin-jointed structure mounted on the wall, with the following information given:
1) S1 and S2 are wall supports, but S2 is assumed to have no friction with the wall i.e. no vertical...