# Static Equilibrium

1. Dec 15, 2014

### Speedking96

1. The problem statement, all variables and given/known data
I have a question about the following question:

Firstly, shouldn't there be a normal force for each hand (part a), but here they treat it as one normal force.

Also in part b, why isn't the torque for Fn1h = 0? Since that is the pivot point, isn't the moment arm zero?

2. Dec 15, 2014

### Simon Bridge

How is the result different if you give each hand a separate normal force?

$F_{N1} \neq 0$ and $h\neq 0$ therefore $F_{N1}h \neq 0$ ... take a closer look: what are they using for the pivot point in that calculation?

3. Dec 15, 2014

### Speedking96

Wow. The pivot point is the location of the foot and N1 is for the hands. I see. Thank you.

4. Dec 15, 2014

### Simon Bridge

Well done. Remember all those horizontal mean static problems - beam between two supports?
Remember how you'd do a sum-of-torques for each support as the pivot?

5. Dec 15, 2014

### Speedking96

I actually don't know what you're referring to as I am learning torque and rotational dynamics on my own (on my final exam tomorrow and my teacher rushed everything on rotation ) - I don't think I've come across a problem like that

6. Dec 15, 2014