Why is the effect of gravatation more on liquid than on solid?

Question

I mean to say it a rather "observatory" way.
For example---
We see tides int he sea rise due to the gravitation of the moon and the sun

BUT

We never see "TIDES" in the desert sand , or do we?

Answer 1

Please give us an example which SEEMS to prove your statement. Then we can show you the defective point of your reasoning.

Answer 2

It isn't. Gravity affects all objects in the same way. Objects may move differently under the force of gravity due to the objects' interaction with the surrounding environment.

Ever see the Astronauts drop a feather and a hammer on the moon? They fell at the same rate. On earth, the hammer would plummet quickly while the the feather would float down after being dropped due to the interaction with the air. Gravity is still applied equally to both objects.

A rock sinks in water, not because gravity is pulling harder on it, but because water does not have sufficient density to stop the rock from passing through it.

Answer 3

Technically speaking, gravitation is equal on liquid and solid.

The equation for gravity is: Force of gravity = mass x acceleration of gravity

So, the force of gravity is dependent upon the mass of the object. The acceleration of gravity is always 9.8 m/s/s. Therefore, the larger in mass and object is, the more force it is pulled towards the earth with. Whether it is liquid or not, as long as it has the same mass, gravity will pull it in the same way.

For example, if you have a 5 lb block and a 5 lb blob of water falling to the ground, they will both technically hit the ground at the same time (negligent of resistance) because they are the same weight.

Answer 4

If the liquid and solid have the same mass they both will be effected exactly the same by gravity. You might be asking why the shape of a liquid is more effected by gravity than a solid. If so, the answer is because the liquid isn't solid and therefore can be reshaped by gravity into a different shape.

Answer 5

You make an erroneous assumption in your question.

Gravity actually has a greater effect on most solids than on liquids. That's why most solids sink when placed in a liquid; gravity is pulling harder on the solid, so hard in fact that it pushes the liquid out of the way in an attempt to get closer to the center of the earth. (which is of course what gravity tries to do).

Gravity operates on the mass of an object. So the more mass you can pack into a volume, the heavier it feels. Another way of saying this is that gravity operates harder on materials of higher density. Typically these are solids (although I suppose rock will float on mercury!)

Hope this helps,

-Guru

Answer 6

I think it is because of the inverse square law.
Gravity exerts a slightly stronger pull on the side facing the Moon than on the other side of the Earth. The non-fluid Earth does not move (much) and the slight vector on all of the fluid water pulls the oceans towards the Moon.