(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The drawing shows a person (weight W = 581 N, L1 = 0.829 m, L2 = 0.399 m) doing push-ups. Find the normal force exerted by the floor on each hand and each foot, assuming that the person holds this position.

http://img401.imageshack.us/img401/3044/p911zz6.gif [Broken]

2. Relevant equations

I know this has something to do with net torque. Wd=wd

3. The attempt at a solution

Ok i tried figuring this out in sveral ways. first, i tried multiplying L1 with 581, the persons weight, and then i divided by 2. This did not work. so tried multplying times l1+l2 and that did not work either. What am I doing wrong? i was sure i had it right the first time around.

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# Homework Help: Find the normal force exerted by the floor

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