# Static Equilibrium Question

1. Feb 7, 2017

### jakeginobi

1. The problem statement, all variables and given/known data

If the load on the uniform beam shown below is moved to the left, how do the tension force T and the magnitude of the vertical force Fv exerted by the wall on the hinge change?

2. Relevant equations
torque = Fdsin(theta)

3. The attempt at a solution
My equation was Tsinx = fd. I understand when the object is moved to the left the distance decreases, and the angle decreases, but I don't understand how the vertical force increases exerted by the wall

Also for the 2nd question ( the ladder one) why is the answer B? What I thought was Fgdcos theta = FN2(d)(cos theta) + FN1(d)(cos theta), so when the distance for FN1 increases wouldn't the force increase too?

#### Attached Files:

File size:
35.8 KB
Views:
16
• ###### 16651810_1336655073044149_1172856270_n.jpg
File size:
36.8 KB
Views:
16
Last edited: Feb 7, 2017
2. Feb 8, 2017

### haruspex

What angle decreases? As I read the question, only the load is moving. The cable stays put.

3. Feb 8, 2017

### haruspex

I cannot understand your notation. Is this a force equation or a moment equation? What is Fgd? Is FN2(d) the force FN2 as a function of d, the distance up the ladder, or is it a force multiplied by a distance?
(You will need to consider moments to answer the question.)

4. Feb 8, 2017

### jakeginobi

Oh I meant Fg(d) and it's for the torque equation

5. Feb 8, 2017

### haruspex

Ok. What point are you taking moments about?
You seem to be using the same d for different distances and the same θ for different angles.