Bed of Nails Demo

[btzmrulvr]

Good stuff man. I would love to see this demonstration in person. Physics is GREAT and fun ;)

[mholmboy]

Very good demonstration. What size nail and type of board was used to make the bed.

[laserpablo]

Student built this bed from 4 inch construction nails and 5/8 inch plywood. Pilot holes were pre-drilled. This demonstration is not without the possibility of hazard.

[horrordude05]

awesome! Physics rules!!! : )

[jugglefan4]

i wish he explained how this works

[laserpablo]

It takes a lot of energy to break the block. As such, it acts as an energy absorber. The block is heavy--it has lots of inertia.The block resists the motion of the hammer. The heavier the block, the better. 3) Pressure=force/area.The greater the number of nails, the greater the area. Therefore, the more nails, the less pressure they exert on. The nails in my beds are about 1 inch apart and are close to the pressure threshold of puncturing my skin (and for sure some do!)--but most don't.

[jugglefan4]

thank you, that was very thourough

[doyeek]

why do you have to use a block on your chest? Can your assistant just hammer your tummy? now that would be more impressive!!

[mazahrehd]

Hey, Mr. Robinson. It's Daniel Mazahreh from the class of 2006. My brother David is in your class this year. Thanks for sharing this GREAT video to all future and current physics students worldwide! I always remember that you enjoy teaching us yum-yum physics! Btw, it's a shame THERE WILL BE BLOOD didn't win the top oscar. That movie had physics written all over it, lol.

[laserpablo]

I agree--that was my pick, too. Hope things are going well for you--good to hear from you.

Mr. R

[yeytom]

wat is it if it aint mind over matter oor magic?

[laserpablo]

Straight forward physics I teach in my classes.

[mangokillah92]

im pretty sure its witchcraft...

[actionfiguremomma]

we have a teacher who does this same demonstration for his class every year too.

its amazing how so many people forget one of the very first lessons of their high school physics class and believe this shit is actually magic or "mind over matter"

hahaha

[MKReptile27]

Dang, Mr. Robinson! That was awesome!

[norvasicbeezy]

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