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Old 07-05-2018, 09:56 AM   #1
bloodstick
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Default Calculation for KE and Momentum.

Last weekend saw me in Texas Archery rigging out a new Triax. Huge upgrade over my old Z2. I decided to go another route with new arrows and ended up with Easton Axis 5mm.

The tech set this thing up perfectly and i was shooting groups like i never have before in minutes. I got to put it on the chrono and it registered 291 fps with a 436 grain arrow. My draw is 29.5 and shooting 70 #

What is the equation to find out my KE and momentum?



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Old 07-05-2018, 10:05 AM   #2
Hoggslayer
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1/2 M(VxV)=K

118 Newton Meters or 87 Footpounds.
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Old 07-05-2018, 11:07 AM   #3
Rat
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Momentum = mass x velocity / 225400

.56 slug
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Old 07-05-2018, 11:24 AM   #4
JasonS
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For the lazy, less math inclined, google KE calculator. There are a few online that you just plug in info. You can play with numbers s quickly
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Old 07-05-2018, 02:05 PM   #5
bloodstick
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Thanks everyone.
I suck at math
So ill use the calculator online. Lol


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Old 07-07-2018, 07:29 PM   #6
ptaylortx
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(Speed in fps)^2 x (Arrow weight in grains) / 450240 = KE in ft/lbs
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