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RE: JR's Science Project
With the bow shooting the first 2 arrows at those speeds,the arrow SHOULD be shooting 264 fpswith the 125 gr tip,not 257 fps.
These kinds of test should be retuned with EACH different setup. If you are using a loop,the arrow is on the stiff side,if not,the arrow is real close to perfect on spine. |
RE: JR's Science Project
ORIGINAL: indianahunter83 Physics says that energy cannot be created nor can it be lost... energy is just transfered. You first transfer your energy into the bow that transfers its energy into the arrow which is stopped by the friction of the target (thus energy is lost in the form of friction or heat) The arrow would stop its penetration once it lost all of its energy. Because of this IMO if you were to have all of the variabilities the same except for mass and as long as the tips were identical (except for weight) I would expect all arrows to lose their KE at a constant rate and therefore they would have identical penetrance. Add in, the fact that heavier arrows absorb more eneregy from the bow and retain more energy downrange you can see why it has a higher momentum and KE. The heavier arrow should penetrate more if the test is a well controlled one. |
RE: JR's Science Project
I appreciate ya'll chiming in. This test was done in hast partly due to time constraints and partly due to procrastination! I wish I had more time to work the bugs out, but it was due on Tuesday. I doubt the 5th grade teacher will know any better. :)Thanks again.
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RE: JR's Science Project
ORIGINAL: Swamp Dawg I appreciate ya'll chiming in. This test was done in hast partly due to time constraints and partly due to procrastination! I wish I had more time to work the bugs out, but it was due on Tuesday. I doubt the 5th grade teacher will know any better. :)Thanks again. |
RE: JR's Science Project
ORIGINAL: ArrowMike ORIGINAL: Swamp Dawg I appreciate ya'll chiming in. This test was done in hast partly due to time constraints and partly due to procrastination! I wish I had more time to work the bugs out, but it was due on Tuesday. I doubt the 5th grade teacher will know any better. :)Thanks again. Unless she was a physics major in college.[8D] |
RE: JR's Science Project
To start with as someone has already alluded to , any target unless it is made of the gel , there is too much variance to test for penetration differences. But since this was the best to be had for the time constraints it was ok. Even though it said the 125 grain tip didnt penetrate as deep it still had the highest momentum factor of all the different tip configurations.
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RE: JR's Science Project
Hey, either way you look at it, if a 5th grader is doing a science project and a bow and arrow is involved, it's likely a good thing for those of us who love bowhunting and archery!!!!!!!!!!!
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RE: JR's Science Project
If everything were identical, then penetration would be identical. However, in this example each arrow had a different weight, different FOC, different dynamic spine and a different entry angle. Add in, the fact that heavier arrows absorb more eneregy from the bow and retain more energy downrange you can see why it has a higher momentum and KE. The heavier arrow should penetrate more if the test is a well controlled one. |
RE: JR's Science Project
It can but in this instance and most cases,it shouldn't have less ke.
[Hey, either way you look at it, if a 5th grader is doing a science project and a bow and arrow is involved, it's likely a good thing for those of us who love bowhunting and archery!!!!!!!!!!! ]EXACTLY OHbowhntr |
RE: JR's Science Project
ORIGINAL: OHbowhntr Hey, either way you look at it, if a 5th grader is doing a science project and a bow and arrow is involved, it's likely a good thing for those of us who love bowhunting and archery!!!!!!!!!!! |
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