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<p>[QUOTE=&quot;Morgan, post: 74722, member: 3630&quot;]LordVger-</p><p>&nbsp;</p><p>The rim on a penny may apear flat and straight but have you ever looked at it through intense magnification, say 20x or more?</p><p>&nbsp;</p><p>The point is unless the coin is uncirculated and not damaged from the minting process it may make very little difference if the obverse applies more moment of inertia than the reverse or vise a versa.</p><p>&nbsp;</p><p>The reason I say this is the rim, edge, is not perfect. No matter how new a cent looks the edge of a circulated coin is disrupted and prone to fall a certain way. That way may alternate at any point along the rim. The reason I say this is the images on the obv and rev of a normally struck coin are recessed further than the edge of the rim. This means the minute change in mass between the obv and the rev have little bearing on the direction. In most cases the edge is prone to one side or the other.</p><p>&nbsp;</p><p>By stricking the table you cause the coin to jump due to the vibration of the table. This jump causes a subsequent impact between the cent and the table. Any small imperfection will cause the coin to be deflected one way or the other. Even air movement, which is normally not sufficient to fell the static coin, can influence the coin during the jump and cause the coin to fall a certain way. Basically there are way to many things happening, and the coin will fall to which ever direction the forces make it fall. Especially if the striking force transmits a horizontal force as well.</p><p>&nbsp;</p><p>Now if we assume the edge is perfect and the table is perfect and all other external factors are constant then and only then can we say that the prefered direction is due solely to the rev and obv. This is however due more to thier relative position about the center line of the coin than anything else. If you look at a coin from the edge and can determine the exact center line that would split the coin in two you can, with one more peice of information, calculate the direction of prefered fall. This last peice is the center of mass. When determining the center of mass the mass the obv and rev masses do come into play, however the strick is still more important. BY strick I am refering to the depth of srtick of each face.</p><p>&nbsp;</p><p>If the obv is struck deeply and the rev is not the bulk of the metal will be on the reverses half of the center line causing the coin to prefer to fall rev down. If the obv is weak and the rev is deep the opposite happens. Numerous combinations are possible especiall when you allow for grease filled and struck through errors to be used.</p><p>&nbsp;</p><p>Basically what I am trying to say is the condition of the edge, impact, and the table have considerably more influence than the strike, which has more influence than the mass of the images.[/QUOTE]</p><p><br /></p>

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