http://www.news.com.au/world/falling-bullet-kills-four-year-old-boy/story-e6frfkz0-1225815908833

 

Wrong place, wrong time. Poor kid - poor parents.

Guns don’t kill people. Idiots with guns kill people and from what I’ve seen Americas full of both.

I heard of this type of thing a long time ago. All those scenes of people firing AKs in the air, apparently a lot of injuries and deaths result from them.

Wow, that is pretty sad.

 

But what the hell was he doing in church playing a gameboy? I guess it doesn't matter now, it is still a tragic loss. It's hard to believe that bullets can come back down with enough force to punch through a roof and kill someone...

well when you think of it its pretty easy, i mean if u drop a coin off of the empire state building they say it can peirce a persons skull with ease. people really need to think more of the results of their actions more.

letz shoot off all our amoooozzzz for new yaezzzz

well when you think of it its pretty easy, i mean if u drop a coin off of the empire state building they say it can peirce a persons skull with ease. people really need to think more of the results of their actions more.

 

A penny dropped off of Empire State will punch through 5cm of solid concrete.

 

Gravity's a bitch.

A penny dropped off of Empire State will punch through 5cm of solid concrete.

 

Gravity's a bitch.

 

Come on thats not true, a penny or any other object reaches it terminal velocity not long after being dropped of 'the empire state building,' the only thing that will effect its lethality is the weight and wind resistance of the object. its not going to punch through five centimetres of concrete! maybe wet concrete! thats just a old wives tail. and thats the reason the kids head didnt explode. The speed of the falling bullet was enough to pierce the wooden roof of the church and the boys skull and consequently kill him, but not go through concrete or other extremely impenetrable materials.

Chugga... you pushed me to do this

 

penny weight = 2.5grams - source: http://wiki.answers.com/Q/How_much_does_a_US_penny_weigh

distance to fall = 373.2m (top floor) - source: http://en.wikipedia.org/wiki/Empire_state_building

wind resistance negligible

 

===

 

Using the formula v^2 = u^2 +2as

 

where

* v = velocity at the bottom of the drop

* u=0

* a=9.8

* s=373.2

 

Velocity works out to be 85.52m/s or 307km/hr.

---

Using F = m x a to calculate Force:

 

m = 2.5g

a = 9.8

 

:. F = 24.5N

===============

 

SO, the question we need to ask ourselves is:

 

"will an object with a force of 24.5N travelling at 307km/hr pierce 5m of concrete?"

 

My speculation: No, but I'm pretty sure your head would explode if you happened to be standing in the penny's path.

 

Gravity's a bitch.

 

But yes stabby, gravity's a bitch - I just fell off my chair from rocking back and forth on the hind legs. Muffled laughs from all four corners of the office :sweat:

Edited January 4, 201015 yr by Stoked24

wind resistance negligible

 

When did this happen?

 

 

Penny Drop

 

Myth statement: A penny dropped from a skyscraper lands with enough force to either kill a pedestrian on the sidewalk below or embed itself into the sidewalk.

 

Status: Busted

 

Notes: Firing a penny at terminal velocity (65 miles per hour (105 km/h)) into concrete and asphalt disks and a ballistics gel head with a human skull failed to result in any penetrations, likely because the speed is too low and a penny's mass too small. Even when fired from a rifle, the penny was unable to penetrate concrete or a ballistic gel dummy's skull. Even modifying a rifle to shoot a penny at supersonic speeds failed to cause a penetration. In comparison, a real 6.5mm bullet split the dummy skull. Visiting the Empire State Building, the likely source of the myth, they realize that updrafts and roofs of lower floors would prevent a thrown penny from reaching street level.

 

Source (http://en.wikipedia.org/wiki/MythBusters_(2003_season)#Penny_Drop)

 

Yes, it's mythbusters.

 

They also tested "firing a bullet straight up" one, and the results showed that if fired straight up in the air, the bullet tumbles on the way down, thus increasing its air resistance, lowering its speed and making the bullet basically harmless. However when shot at an angle, the bullet continues spinning, and keeps almost all of its initial energy.

Next you'll be telling me Santa Claus isn't real.

He's on our forums... so nobody here would believe otherwise....

Next you'll be telling me Santa Claus isn't real.

 

http://attrition.org/misc/humor/xmas-proof.html

 

destroying your imaginary childhood holiday beings since 2010

A penny dropped off of Empire State will punch through 5cm of solid concrete.

 

Gravity's a bitch.

 

i still trying to find out were that magic button is to turn this so called gravity off

When did this happen?

Then tell me what else I should've done. I'm only a sysadmin, give me a break!

 

i still trying to find out were that magic button is to turn this so called gravity off

 

Type into console "sv_gravity 0"

Edited January 4, 201015 yr by Stoked24

Type into console "sv_gravity 0"

lol +1

Poor kid i always wondered how often this happened.

wind resistance negligible

 

Yea.. When ever people punch out some physics they always disclude wind resistance.. Not because it isn't a major factor but because its hard to include..

 

If I made a question about a paratrooper falling with a open shute you'd probably disclude wind resistance then

 

Wind Resistance is of absolute importance contrary to popular belief.. A penny has a terminal velocity about 1/3 that a AK47 round should have. As the Round is aerodynamic and will direct itself downwards after turning around and falling as it follows the path of least resistance. So what you would have is a 8-10gram Spear falling at 300km/h or 83.3m/s vs a 6.5g(?) less aerodynamic (could be spinning?) at 100km/h. So just goes to show how important wind resistance is. I will not let people take its name in vain again.

 

Still I think the bullet has like about 1/6-1/7th of its original kinetic energy. Unlucky kid.

Edited January 4, 201015 yr by snowman777a

I found myself on a American PR server about a year ago... (it's 2pm in NZ - why is nobody playing!?)...

 

...anyway, somebody seemed to have turned gravity waaaay down, and peeps were cruising around on those 4-wheel motorbikes, and doing massive air jumps... like 50m in the air... It was kinda fun - but not exactly PR.