Calculating weight on fulcrum points

I was going to upload a picture but I couldn't, so I'll have to get creative.

This problem has been driving me nuts, and I don't really trust my answer. The question is, **How much weight is on fulcrum A and Fulcrum B?** I get 1380lb. for fulcrum B and 620 lbs. for fulcrum A. Is that correct?

Information: The block is 40 inches long. Fulcrum A is situated 2 inches in from the edge. Fucrum B is 12 inches in from the edge. That leaves 26 inches between the two fulcrums because the block is 40 inches long. The block weighs 2000 pounds. The two I's would be the fulcrums. In real life, the block is 3 dimensional, but I hope this picture makes sense.

0000000000000000000000000000000000000000

0-------------------------------------------------------------0

0-------------------------------------------------------------0

0-----------2000 pound concrete block----------------0

0-----------(this block is 40 inches long)--------------0

0-------------------------------------------------------------0

0-------------------------------------------------------------0

0-------------------------------------------------------------0

0-------------------------------------------------------------0

0000000000000000000000000000000000000000

....I............................................. ....I....................................

fulcrum A----------------------------fulcrum b

Re: Calculating weight on fulcrum points

Quote:

Originally Posted by **SteveC**

I was going to upload a picture but I couldn't, so I'll have to get creative.

This problem has been driving me nuts, and I don't really trust my answer. The question is, **How much weight is on fulcrum A and Fulcrum B?** I get 1380lb. for fulcrum B and 620 lbs. for fulcrum A. Is that correct?

Information: The block is 40 inches long. Fulcrum A is situated 2 inches in from the edge. Fucrum B is 12 inches in from the edge. That leaves 26 inches between the two fulcrums because the block is 40 inches long. The block weighs 2000 pounds. The two I's would be the fulcrums. In real life, the block is 3 dimensional, but I hope this picture makes sense.

0000000000000000000000000000000000000000

0-------------------------------------------------------------0

0-------------------------------------------------------------0

0-----------2000 pound concrete block----------------0

0-----------(this block is 40 inches long)--------------0

0-------------------------------------------------------------0

0-------------------------------------------------------------0

0-------------------------------------------------------------0

0-------------------------------------------------------------0

0000000000000000000000000000000000000000

....I............................................. ....I....................................

fulcrum A----------------------------fulcrum b

You are close. I get B= 36000/26 which is close to 1380. A is of course 2000-B.