Gravity, Earth and the Moon

From another post I did I want to dicuss this.

Gravity is based upon the earths core, the further away from the core we get the less the gravity.

The Earth is growing because of space debris and star dust.. as someone said its an inch a year.

The Earths crust is not relative to our gravity.

When Dinosaurs were on the Earth the Gravity was less... thats the only way to explain the larger masses

So my question is: if the earth is expanding and us living on the surface are moving further from the core... how is it that gravity is getting heavier.

I have an answer that I think is right but I will let this go for now

m.

reply to post by mikem


Gravity is dependent on mass.

Add more material, therefore adding more mass.

Originally posted by mikem
From another post I did I want to dicuss this.

Gravity is based upon the earths core, the further away from the core we get the less the gravity.

The Earth is growing because of space debris and star dust.. as someone said its an inch a year.

The Earths crust is not relative to our gravity.

When Dinosaurs were on the Earth the Gravity was less... thats the only way to explain the larger masses

So my question is: if the earth is expanding and us living on the surface are moving further from the core... how is it that gravity is getting heavier.

I have an answer that I think is right but I will let this go for now

m.

Could you please post a link to the source stating that the planet is expanding 1 inch a year?

I ask as this goes against scientific convention as of now:

While suggested historically, since the recognition of plate tectonics in the 1970s scientific consensus has rejected any expansion or contraction of the Earth.

Expanding Earth Wikipedia

Gravity is not based upon the Earth's core. Gravity is based upon the mass that an object has. The more mass an object have, the stronger it's gravitational field:

Gravity

Dinosaur's size has many theories generally accepted, lower gravity not being one of them:

dinosaurs.about.com...

However, before you do start off on this path, keep in mind that Dino's being big due to lack of gravity and expanding Earth has been written about, with books published back in 1994.
However keeping with the rules of the forum, I can't post a link advertising the book, however, you can Google this name here:

Stephen Hurrell

And add the word Dinosaurs to the search.

The core is responsible for our magnetic field, not gravity. It is mass that dictates how much gravity we have, the more mass the higher the gravity.

Originally posted by NoNameBrand
The core is responsible for our magnetic field, not gravity. It is mass that dictates how much gravity we have, the more mass the higher the gravity.

This here is what its all about.....you beat me to it......

To add, mass and velocity dictates gravitational pull...so in a sense its not just mass that creates the active force of gravity, but motion as well as this further goes to add to the force of pull within the mass. The fact that most things in space spin in one way or another.....even if the planet doesn't spin...its revolving around something bigger that does usually creating a stronger field of pull.

The only exception to this, and Im not sure how it would relate in common physics as we have yet to study this phenom is exo-planets that are not attached to a star of any kind and free floating outside the pull of a stars mass and gravity pull.

Believe it or not they are intertwined with one another thus adding the compounded effect of gravity. Basically its not just mass, but the motion of other objects around it and the way they move and interact with one another. Still the basic answer is still mass.

Maybe we don't rotate as faster as we once did and now that the planet is slowing down the gravitational pull is different?

the strongest point of gravity is at the center. and the faster you rotate the less gravity.

Originally posted by TheLieWeLive
Maybe we don't rotate as faster as we once did and now that the planet is slowing down the gravitational pull is different?

Rotation has nothing to do with actual gravity. Artifical gravity, yes. But if the Earth were to come to a screeching halt (and assuming you survived the global disasters that would cause), and no longer rotate, you would be walking around, weighing just as much then as you do right now.

Point in fact: Venus rotates MUCH slower than earth, to where it's "day" is actually longer than it's year, yet you would weigh almost 90% of what you do here on Earth, but only because Venus has less mass than the Earth.

However, yes, the Earth is slowing down due to gravitational friction from the moon, and has been since the moon formed billions of years ago. But by a very small amount.

Originally posted by biggmoneyme
the strongest point of gravity is at the center. and the faster you rotate the less gravity.

That is NOT gravity. That is called Centrifugal force:

Centrifugal Force

THIS is gravity (I already posted this once in this thread):

Gravity

Originally posted by eriktheawful

Originally posted by biggmoneyme
the strongest point of gravity is at the center. and the faster you rotate the less gravity.

That is NOT gravity. That is called Centrifugal force:

Centrifugal Force

THIS is gravity (I already posted this once in this thread):

Gravity

you misread. i didnt say the rotation caused gravity. i said it reduced gravity. and it does.

reply to post by biggmoneyme


It reduces the perceived force of gravity, not the force of gravity itself.
Gravity is not strongest at the center. In fact, gravity is 0 at the center. It's strongest at (or near) the surface.

you people need to go back to school

Originally posted by CLPrime
reply to post by biggmoneyme

 

It reduces the perceived force of gravity, not the force of gravity itself.
Gravity is not strongest at the center. In fact, gravity is 0 at the center. It's strongest at (or near) the surface.

you're kind of right, but not really
if you were at the center of the earth the gravity would be accelerating you the fastest, but this would be in all directions, so the overall effect of gravity would be 0 m/s^-2.

reply to post by mikem


Missing link or it did not happen:up

reply to post by biggmoneyme


The force of gravity is always a net force. I am right, no matter how you define it. The net gravitational force at the center is 0.

reply to post by biggmoneyme


Im over 40...history needs a new progam

reply to post by CLPrime


aha...tis it not 9.8 on the surface.

reply to post by saroncan


Generally, it is.

any animal will grow larger if you feed it. try feeding an alligator every day and watch him become a dinosaur

Originally posted by wlord
any animal will grow larger if you feed it. try feeding an alligator every day and watch him become a dinosaur

Yep........:looks down at pot belly:

Actually Beer works good too. Imagine an alligator on a Beer diet! He'd be a BIG mean ol' drunk.