Is there a super-hyper mathematic who could answer this.

crazyskwrls · **Joined:** Aug 2007 **Posts:** 2293 **Location:**

and also it depends on how much body fat u have

i am not sure of this but if u are all fat no muscle one there is going to be more resistance on ur body

here is another crazy one....

the aerodynamics of your body also is a factor if you have a big head its not good

Grandpa · **Joined:** Feb 2008 **Posts:** 867 **Location:**

Best guess of factors that should be considered:

Height of jump: 7.5 meters is fine but 15 meters HURTS.
Depth of water: At the given distance twice your height is ok if you know what you're doing, deeper is better.
Position of your body relative to the water on impact: This cannot be ignored. Don't trip.

The final factor is what I spoke of before -- enter the water feet first and when you feel yourself hit, start to bring your knees and feet upward to form a "J" position. This (if done properly) will turn your trajectory toward the horizontal and reduce the depth of your immersion.

Other factors including an in depth analysis are minor especially if one does not have sufficient understanding of Physics (I don't) to apply it. Oh, surface tension does have an effect. Is it windy? Can you see waves on the water? This is more important the higher you go and can be almost completely ignored at a distance of 7.5 meters. Given there is nothing hidden underwater (like a log or a piranha) it sound more than safe enough.

If it were me I'd jump that distance into sand. In point of fact, I have (well, almost - it was more like 20 feet). I was very young, there was a girl and she was cute in my sight. What better way to impress a young lady than to try to kill yourself for her amusement, right? I must have cracked or bruised my tailbone because it was years before I could sit through a feature length movie without discomfort. Don't worry, I can sit on my butt fine now (hehehe - too well in fact) and Mary was suitably impressed. She giggled. I was happy.

Barotix · **Joined:** Jul 2007 **Posts:** 9250 **Location:** Sand

To many variables in this problem. :banghead:

Pham · **Joined:** Aug 2007 **Posts:** 541 **Location:**

srf_frs wrote:

Alright, heres the deal: I weight 68 kilograms( should be about 138 pounds), i'm 1.81 tall if thats neccessery. Anyways, how deep(water ofc) would i go if jump off from a platform. I hope u get what i mean. Platform is 7,5 meters high from water.

why are u calcualting? just jump godam it and have fun, dam nerds these days

Barotix · **Joined:** Jul 2007 **Posts:** 9250 **Location:** Sand

Pham wrote:

srf_frs wrote:

Alright, heres the deal: I weight 68 kilograms( should be about 138 pounds), i'm 1.81 tall if thats neccessery. Anyways, how deep(water ofc) would i go if jump off from a platform. I hope u get what i mean. Platform is 7,5 meters high from water.

why are u calcualting? just jump godam it and have fun, dam nerds these days

Because he doesn't want to get hurt.

Pham · **Joined:** Aug 2007 **Posts:** 541 **Location:**

Barotix wrote:

Pham wrote:

srf_frs wrote:

Alright, heres the deal: I weight 68 kilograms( should be about 138 pounds), i'm 1.81 tall if thats neccessery. Anyways, how deep(water ofc) would i go if jump off from a platform. I hope u get what i mean. Platform is 7,5 meters high from water.

why are u calcualting? just jump godam it and have fun, dam nerds these days

Because he doesn't want to get hurt.

dbout he will, unless he jump in a kiddies 2 feet pool

Innovacious · **Joined:** Sep 2006 **Posts:** 2446 **Location:**

just belly flop in so as much surface area of your body as possible hits the water at the same time. At that height it might sting a bit but you wont go very deep into the water.

SM-Count · **Joined:** Jan 2008 **Posts:** 2761 **Location:** /wave

The answer is around 4.2M but I think I over-estimated... a lot. This is assuming you have perfect aerodynamics and hit the water with a 10 entrance. I'm sure you'll be fine with anything with a 3.5~3.8M depth though, the most will probably be your touch the bottom, nothing serious.

Edit: TBH, if it was me, although I am a bit shorter than you are, I'd jump into a 3 meter water depth from 7.5 and be confident that I'll suck up the landing enough not to get hurt.

Pham · **Joined:** Aug 2007 **Posts:** 541 **Location:**

lol i never seen anyone do this much math for having fun jumping in water, might as well calculate how fast u walk so u dont trip when ur going out with ur friends. Hopefully u can do that fast enuff before they realize ur a loser

Midori · **Joined:** Mar 2007 **Posts:** 3425 **Location:**

how wide is the river btw? or can always get in a boat go under and see how deep it is.

Grandpa · **Joined:** Feb 2008 **Posts:** 867 **Location:**

C'mon guys. The OP has participated less than anybody else in this thread. He's probably out having fun while we losers wrongly assume things about his intent.

More likely he never expected this much esponse.

crazyskwrls · **Joined:** Aug 2007 **Posts:** 2293 **Location:**

just do it if u get hurt post here while in the hospital, if ur paralyzed/dead, leave a note before u go so ur friend can post here

if ur not hurt dont post we dont care about it

dom · **Posted:** Sun Jul 13, 2008 5:00 pm

Stephanus wrote:

I studied physics for like 8 year:)

So you have a doctorate?

hootsh · **Posted:** Sun Jul 13, 2008 5:07 pm

Jump horizontally.

srf_frs · **Joined:** May 2008 **Posts:** 130 **Location:** hellhole

Midori · **Joined:** Mar 2007 **Posts:** 3425 **Location:**

It seems safe deep enough to me, just make sure you have someone in a boat close to the spot your going to jump, if you go in wrong you might blackout. Straighten your body horizontally before you hit the water.

Then again you can always go ask someone how deep the water is at that spot (someone is bound to know)

Grandpa · **Joined:** Feb 2008 **Posts:** 867 **Location:**

[Image deleted]

Argonaut · **Joined:** Jun 2008 **Posts:** 1162 **Location:**

Grandpa wrote:

Picture

You'd need a cannon to make it in the water for the second one..

PuppetOfGaea · **Posted:** Tue Jul 15, 2008 6:58 am

Argonaut wrote:

Grandpa wrote:

Picture

You'd need a cannon to make it in the water for the second one..

Don't you know, he's a living Pilotwings character (I'll be surprised if anyone gets that reference).

Grimjaw · **Posted:** Tue Jul 15, 2008 2:01 pm

dom wrote:

Stephanus wrote:

I studied physics for like 8 year:)

So you have a doctorate?

I lol'd.

Grandpa · **Joined:** Feb 2008 **Posts:** 867 **Location:**

hootsh · **Posted:** Wed Jul 16, 2008 12:55 am

hootsh wrote:

Jump horizontally.

Do it...seriously...would be fun...your skin wouldnt be very happy for the next few days but its worth the risk.

Not worth the hassle of all the calculations.

Note: Please have one of your friends make a video of this.

Do it......

....do it..

.......

....do it

( :twisted:

)

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