DAN PRAYDIS Posted January 3, 2006 Share Posted January 3, 2006 big one foot round balls would maks some heavy stuff just a cool pic http://images.google.com/imgres?imgurl=htt...%3Doff%26sa%3DN Quote Link to comment Share on other sites More sharing options...
gazza Posted January 3, 2006 Share Posted January 3, 2006 Nice Those are some big balls What ya reckon they weigh. Quote Link to comment Share on other sites More sharing options...
DAN PRAYDIS Posted January 3, 2006 Author Share Posted January 3, 2006 im guessing at least 125 or more someone might know how to measure from volume im not that smart Quote Link to comment Share on other sites More sharing options...
perrymk Posted January 3, 2006 Share Posted January 3, 2006 From the article: "These are solid steel balls about a foot in diameter! " That means the radius is 6 inches. From my old college physics book: volume = (4/3)PiR^3 plug in the numbers V = (4/3)(3.14)(6*6*6) V = 904.32 cubic inches My old physics book lists the density of steel as 7.8 g/cubic centimeter. I suppose different types of steel might vary a little but this should be close enough for our purposes. So we need to convert cc to ci. 7.8 g/cc ((2.54cm/1in)^3) = 127.8 g/ci Now let's convert the grams to pounds 127.8 g/ci (1 lb/454 g) = 0.281 lb/ci So now that we know the volume and density, let's multiply: (904.32 ci)(0.281 lb/ci) = 254 lbs So each steel ball weighs 254 lbs. The first question is, does this answer make sense? Because I've done similar calculations in the past I can say that this sounds about right. Quote Link to comment Share on other sites More sharing options...
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