# Why we not get attracted by pyramid ?

1. Aug 9, 2011

### joyever

why we not get attracted by pyramid ??

pyramid have much mass than us than why we are not attracted by them?

2. Aug 9, 2011

### Staff: Mentor

Re: why we not get attracted by pyramid ??

Why do you think you aren't attracted to them? You're attracted by all mass.

3. Aug 9, 2011

### joyever

Re: why we not get attracted by pyramid ??

no its wrong if i m standing slightly away from pyramid i will not get attracted to it...

4. Aug 9, 2011

### Staff: Mentor

Re: why we not get attracted by pyramid ??

You may not feel it, but you are attracted to it.

5. Aug 9, 2011

### Staff: Mentor

Re: why we not get attracted by pyramid ??

Sure you will.

6. Aug 9, 2011

### phinds

Re: why we not get attracted by pyramid ??

It sounds like you need to study the fundamentals of gravity, unless the issue is that you think that the mass of a pyramid has special properties BECAUSE it is a pyramid, and if that is the case then you are off into crackpottery.

7. Aug 9, 2011

### audiologies

Re: why we not get attracted by pyramid ??

Do some math dude. Force due to gravity equals (G*m1*m2)/r^2

Great pyramid of Giza: Mass = 5,900,000,000 kilograms
Height: 139 meters
Base: 230 meters

If you walk up to the middle of one side you are 123 meters from the center of gravity.

F = 6.67*10^-11 * 75kg * 5.9*10^9 kg / 123^2

F = .002 Newtons

Feel that dude?

8. Aug 9, 2011

### AlephZero

9. Aug 10, 2011

### audiologies

Re: why we not get attracted by pyramid ??

Cool experiment, thanks for the link!

10. Aug 10, 2011

### Studiot

Re: why we not get attracted by pyramid ??

You may like to know that this was how Mt Everest was discovered by westerners.

During the survey of India in the 1800 it was observed that the plumb bobs of the surveying instruments hung slightly off vertical to the North and it was concluded that there must be a large mountain range to the north to cause this.

Geologically speaking, Mt Everest is a pyramid peak.

go well

11. Aug 10, 2011

### phinds

Re: why we not get attracted by pyramid ??

Interesting, but what I would find more interesting is to know how they determined that the plumb bob was off vertical. What did they use to establish vertical?

12. Aug 10, 2011

### Bloodthunder

Re: why we not get attracted by pyramid ??

Definitely not a plumb bob XD

13. Aug 10, 2011

### mathfeel

Re: why we not get attracted by pyramid ??

The Wiki page linked above says they used certain heavenly body.

14. Aug 10, 2011

### DaveC426913

Re: why we not get attracted by pyramid ??

In conclusion, audiologies is correct in doing the measurement.

You do feel a pull from the pyramid - it is just very small compared to the pull of the Earth.

Note that you do not feel this pull "sideways" - in case that's what you are expecting. One only feels the net pull of gravitational forces - you will feel a pull down like normal, just slightly off vertical - but again, too small to feel. Though not too small to measure.

#### Attached Files:

• ###### PF20110810_pyramid.gif
File size:
3.9 KB
Views:
147
Last edited: Aug 10, 2011
15. Aug 11, 2011

### Studiot

Re: why we not get attracted by pyramid ??

Mathematics.

They measured vertical angles and the angles of the observed vertical triangles did not add up to 180. The only explanation was that the 'vertical' reference (the plumb line) was in fact leaning.

There is an interesting recent book by John Keay called

The Great Arc

which describes this.

go well

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook