Wednesday, January 25, 2012

--velocity/straight-drop calc( in atmosphere)--


      velocity calc--

                          (feet)
    (pounds)      (distance)        (foot-pounds)
    (weight)  -    (in atmo)    =       (force)             (distance to geo-sync interposed...in atmo)
      100      -        1           =         99
                                                                                                                                   

    (foot-pounds)                            (foot-pounds per-sec)
        ( force)        %   (sec)   =        (force per second)--
           99            %     60     =                 1.65
       
     (foot-pounds per sec)              (feet)            (inertia x sec)
   ( force per sec, per sec)   x     (distance)   =     (velocity)
               1.65                              100         =        165
     
      (velocity)    %     (sec)  =   (sec to bird-feeder)
         165         %      60     =            2.75    

        calc to mph--

                                               (feet)
        (1 mile in feet)    %       (distance)            (multiplier)
             5280            %           100          =        528

       (multiplier)          (sec to bird-feeder)          (sec to reach 1 mile)
           528         x               2.75               =              1452

 (sec to reach 1 mile)   %     (sec in 1 hour)  =    (un-modified mph)  (deploy decimal putting)
           1452                %          3600           =          0.40333            (system, bang right 2 )
                                                                                                                (places)
                                                      (first put)
         (un-modified mph)   =        (mod-tenths)      
                0.40333            =           4.0333               

              (second put)
          (mod-hundredths)    =       (mph)
                4.0333              =      40.333

   velocity calc w/drag(skydiving)--

         the problem...

   200 pound man(all gear included), with a 2000 square inch parachute(open), dropping 100 feet = how much time to "bird-feeder", and how fast does he drop--

         example--

      (pounds)                                           (pounds)            (pounds)
      (weight   %  sq inches)  =   (drag)  +  (weight)  =    (square-weight) 
        200      %   2000        =   -10     +      200     =          190

                                 (feet)
       (pounds)         (distance)          (sq foot-pounds)
     (sq-weight )  -   (in atmo)    =           (force)
         190                    1          =             189

   (sq foot-pounds)                              (sq foot-pounds per sec)
         (force)            %      (sec)     =        (sq force per sec)
           189              %        60                        4.8333

     (sq foot-pounds)   x       (feet)
    (sq force per sec)   x   (distance)   =    (velocity)
            4.8333                   100               148.333

    (velocity)    %    (sec)   =     (sec to bird-feeder)
     148.33      %     60     =           4.41666

     calc to mph--

                                          (feet)
   (1 mile in feet)   %        (distance)           (multiplier)
         5280           %           100         =         528   

    (multiplier)    x     (sec to bird-feeder)   =     (sec to reach 1 mile)
        528          x           4.41666             =           119.54735

(sec to reach 1 mile)    %  (sec in 1 hour)  =  (un-modified mph)  (deploy decimal putting)
      119.54735            %        3600         =         0.0332             (system, bang right 2)
                                                                                                         (places)
                                                     (first put)
           (un-modified mph)   =      (mod-tenths)
                  0.0332             =          0.332

                (second put)
            (mod-hundredths)   =        (mph)
                    0.332             =         3.32

    it seems the decimal must be banged back over two places, to the right(once for each place, in the feet catagory)--

      answer--
                     seconds to bird-feeder   =    4.41666   (sec)
                                             speed    =     3.32        (mph)
                
       best wishes, john kruschke--

 this one is good, but i am still tiding up the post so it reads easy...more later(out of time at the library)--


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