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## Main Question or Discussion Point

Hey guys,

I have a counterweight that connects to an L-shaped link that pivots about a point.

I need to work out the moment at the pin due to the counterweight, but I am stuck on the basics.

The first free body diagram I drew assumes that the weight of the counterweight acts entirely as a compressive force along the first link. The second assumes that this force is broken into x and y components.

I believe that the length of link 2 has an effect on the moment at the pivot point. I.e. as the length of link 2 is increased the moment at the pivot point will change, is this correct?

I am stuck figuring out which FBD is correct.

Any help is appreciated!

Edit - Having trouble uploading the image, so I used imageshack

http://img511.imageshack.us/img511/8489/fbdp.jpg [Broken]

I have a counterweight that connects to an L-shaped link that pivots about a point.

I need to work out the moment at the pin due to the counterweight, but I am stuck on the basics.

The first free body diagram I drew assumes that the weight of the counterweight acts entirely as a compressive force along the first link. The second assumes that this force is broken into x and y components.

I believe that the length of link 2 has an effect on the moment at the pivot point. I.e. as the length of link 2 is increased the moment at the pivot point will change, is this correct?

I am stuck figuring out which FBD is correct.

Any help is appreciated!

Edit - Having trouble uploading the image, so I used imageshack

http://img511.imageshack.us/img511/8489/fbdp.jpg [Broken]

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