- #1
LuigiAM
- 55
- 7
Hi everyone,
Our professor gave us a bunch of solved problems to practice with before the exam, and this one I'm struggling with:
I'm trying to work through the solution step by step, and I get stuck at the point (3).
What I understand is that we want to get the value of RH, which is equal in magnitude to friction. So to do this, we do rotational equilibrium - the total of all the moments must be zero.
What I don't understand is why is it set equal to RH times 4? I don't understand this. RH is acting at the end of the latter, which is 5 meters long. Shouldn't it be RH times 5 instead of 4?
Our professor gave us a bunch of solved problems to practice with before the exam, and this one I'm struggling with:
I'm trying to work through the solution step by step, and I get stuck at the point (3).
What I understand is that we want to get the value of RH, which is equal in magnitude to friction. So to do this, we do rotational equilibrium - the total of all the moments must be zero.
What I don't understand is why is it set equal to RH times 4? I don't understand this. RH is acting at the end of the latter, which is 5 meters long. Shouldn't it be RH times 5 instead of 4?