ELKINMTCWB wrote:
1st In relation to some thing a HILLBILLY would understand what is 1 KE vauied to? [like a 8 oz wight droped?]
If you droped something that weighed 8 oz from a distance of 2 feet it would carry 1 ft/lb of KE at impact.
2nd I have the pc thing for calcuating KE it seems to take quite abit of arrow grs or puondage to rase ke alot. So to me this meens 1 KE is a lot?
I guess that depends on what you compare it to. 1 ft/lb is a lot if you only need enough energy to move a postage stamp but it would be a pittance if you wanted to move a train with it.
3RD If my bow shoots an arrow at 297 fps and my arrow is 552 grs what would my ke be and what would my PEITRATION be? I have 3 difrant numbers for ke right now with the same numbers useing difrant calulaters.Why is this?
That would be 108.1 ft/lbs of KE. I suspect the difference is in the value the different calculators use for the acceleration of gravity. Because grains is not mass it has to be converted and to do this you divide grains by 7000 becuase there are 7000 grains in a pound and then becuase pounds is still a force and not mass you divide again by the acceleration of gravity. This is a number kind of like PI you can carry it to as many places as you want for accuracy. Most use 32.16 but some use less or more decimal places. Unless you are getting really big differences I suspect this is the reason.