# Homework Help: Statics question about moments

1. Oct 3, 2012

### hockeyguy314

1. The problem statement, all variables and given/known data
Find the components of the force at D and C using moments

picture attached

2. Relevant equations

M=F x r

3. The attempt at a solution

I'm really stuck on this one. The force from the 70 kg weight is 70*9.8 = 686N, so F=-686j. I found the moment about point C to be Mc=1715k. After that, I'm not sure where to go. I'm also really thrown off by the white line that's at a 60° angle below the x axis. Any help would be greatly appreciated. Thanks.

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2. Oct 4, 2012

### pongo38

It looks to me that the white line is an arrow representing the force required to keep the device in equilibrium. Does that help?

3. Oct 4, 2012

### hockeyguy314

Yes, it does help thank you. I still don't know where to go from here though. I guess I'm not really sure how the moment about C would translate into components of force.

4. Oct 4, 2012

### pongo38

Well, do you not know enough to be able to calculate the white force itself, even if you don't know its components?