Posted by visoth on Wednesday, April 25, 2012 at 9:10pm.
The mass of the stick where M resides is 30g, centered at distance 15.
The mass of the stick where m resides is 70, centered at distance 35
Adding up all the mass*distance values, they must balance on both sides of the fulcrum.
30(15) + 200(20) = 70(35) + 50(d)
450 + 4000 = 2450 + 50d
50d = 2000
d = 40
so, m sits at 40cm from the 30cm mark, or at the 70cm mark.
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