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Arrow Dynamics Calculator

   IOB (feet per second)           
   Draw Length (inches)           
   Draw Weight (pounds)         
   Arrow Weight (grains)          

    
   True Initial Arrow Speed (fps)          
   Initial Kinetic Energy (lb-ft2/sec2)    
   Initial Momentum    (lb-ft or slugs)   

 Kinetic Energy                       You Can Hunt

from: http://bestcompoundbowsource.com/compound-bow-kinetic-energy/