6th Grade science project using .22

[tornadowatchranch]

Hey all

I have gained so much from you guys over the years I thought I would offer up an idea.

For my son's 6th grade science project we decided to test mass and inertia by using a .22. We got 5 different weights and FPS of .22 ammo at the gun show and shot them into the thickest book the DAV had. He measured how far into the book each projectile penetrated (this one went to page 687, this one to 1254, etc). Some of the aguilar ammo is all the way down to 20 Grain and 550FPS.

His teacher is super cool and wanted us to specifically point to the safety aspect of the preparation. We included hearing/eye protection and an adequate backstop.

He came up with the idea about a week after Sandy Hook. I was a bit surprised it was approved. We live in a semi-rural area so that likely helped.

I just thought I would offer it up in case anyone else needed a project idea.

Have a great day

 

[Buckgnarly]

Awesome, and kudos to the school for seeing the educational benefits proper use of guns can have on students!

 

[dmccarty]

Ah....

Ok....

Lets see the numbers and his report! :laughing::laughing::laughing:

You can't tell us about the experiment without showing the results!

Later,
Dan

 

[r8nger]

Sandy hook

 

[k0ua]

In the "Olde" days and I do mean "Olde" days, before any kind of electronics. they measured velocity with a thing called a Ballistic Pendulum and a lot of mathematics. The idea was you fired a round at a pendulum of steel of a known weight, on a knife edge "bearing" and attached to the pendulum was a cloth tape measure that when the pendulum moved backwards it drug this cloth tape measure thru a slot and of course when it moved the other way the cloth tape measure did not move backwards. You then read the tape measure to determine how much the bullet moved the known weight pendulum and from that you could calculate with a given bullet weight what the energy was striking the pendulum and work backwards to calculate the velocity of the bullet.. All very imprecisely I might add..

James K0UA

 

[kennyd]

That would not go over well here in Maryland :shocked: where we had a child suspended for chewing a pop tart into the perceived shape of a gun.

I am glad your school and teacher obviously has som common sense...

 

[Gunny]

Sandy hook

If that's all you can come up with, why bother, unless you're just wanting to up your post count? Senseless, out of place and totally out of context!

 

[TripleR]

That's great, I am glad it is still accepted in some areas. I live in a rural area and my daughter teaches in a nearby school district where I believe it would be acceptable. The hysteria that seems so prevalent in many areas is not universal fortunately.

 

[dave1949]

Are you really testing just mass and inertia? I would think the shape/profile and composition of the bullet would also have an affect on penetration that isn't being controlled for in the experiment perhaps. I am assuming those things can vary slightly from one load to another.

 

[kennyd]

Sandy hook

If that's all you can come up with, why bother, unless you're just wanting to up your post count? Senseless, out of place and totally out of context!

I "think" he meant that in the original post, Tornado wrote Sandy something else-it has since been edited to say "Sandy Hook"

But, R8nger sure could have written just a few more words to explain that and not appear to be a hit-n-run poster...