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   rec.arts.sf.written      Discussion of written science fiction an      448,027 messages   

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   Message 446,115 of 448,027   
   Mark Jackson to Scott Dorsey   
   =?UTF-8?B?UmU6IHhrY2Q6IOKAnFBoeXNpY3MgSW   
   15 Oct 25 13:38:23   
   
   XPost: rec.arts.comics.strips   
   From: mjackson@alumni.caltech.edu   
      
   On 10/15/2025 10:34 AM, Scott Dorsey wrote:   
   > Scott Dorsey  wrote:   
   >> Paul S Person   wrote:   
   >>> IIRC, at some point Galileo was in charge of the Pisan   
   >>> artillery.   
   >>>   
   >>> I wonder if he was trying to find out why their "time on target"   
   >>> computations [1] never worked with Aristotle's view of how   
   >>> things fell.   
   >>   
   >> _Two New Sciences_ has a discussion of this and is well worth   
   >> reading.  Note that Galileo is thinking throughout of bodies   
   >> attracted to the earth and never makes that great jump of   
   >> Newton's.   
   >   
   > I take that back.  I thought there was a discussion of time of   
   > flight but looking it up I find there is not.... it would be   
   > difficult to do without the calculus I suspect.   
      
   Probably not.  Did they know the muzzle velocity of the devices to which   
   a given distance/angle table applies?  Then, assuming no meaningful   
   impact of air resistance:   
      
   time-to-target = distance divided by (muzzle velocity)*cos(angle).   
      
   --   
   Mark Jackson - https://mark-jackson.online/   
      Against the assault of laughter nothing can stand.   
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