# The Naked Scientists Forum

### Author Topic: Objects fall toward the greatest gravitational field in the region.  (Read 847 times)

#### EEK

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##### Objects fall toward the greatest gravitational field in the region.
« on: 15/04/2015 00:47:11 »
Reasons: It is said that both earth and the Newton's apple accelerate toward each other gravitationally but apple looks a lot to the earth due to its greater acceleration as compared to the earth towards an apple which is so minuscule to be distinguished.

Thus both earth and the apple change their positions simultaneously during their progression with (complex motion) higher derivatives of position instead of simply with gravitational accelerations therefore cognizance tells that they should strike each other much earlier in time than belied in the Newton's law of gravity.

Similarly, equivalence principle based on the idea that all objects accelerate at the same rate in the absence of air on the surface of earth. Since earth is also accelerated towards the two different gravitational fields of heavier and lighter objects in the Galileo experiment therefore cognizance also tells that the heavier objects should always strike each other first as the gravitational strength of heavier object is greater than the lighter unless it is the natural tendency of physical entities to drive towards greatest gravitational field in the region.

#### Colin2B

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##### Re: Objects fall toward the greatest gravitational field in the region.
« Reply #1 on: 15/04/2015 08:42:50 »
... but apple looks a lot to the earth due to its greater acceleration as compared to the earth towards an apple which is so minuscule to be distinguished.
You need to think about more than just acceleration to understand what is happening

therefore cognizance tells that they should strike each other much earlier in time than belied in the Newton's law of gravity.

......cognizance also tells that the heavier objects should always strike each other first
As with most of our senses, the way our mind interprets them can lead us astray, some more than others.

as the gravitational strength of heavier object is greater than the lighter unless it is the natural tendency of physical entities to drive towards greatest gravitational field in the region.

It isn't the gravitational strength.

The force between 2 masses is the same for each and is proportional to the product of the 2 masses. (It is also inversely proportional to the square of the distance between them.) So the force attracting an apple and a 10ton rock towards each other is the same for each of them.

To understand what is happening you also need to consider inertia. Try using the same 1lb force to push an apple or a 10 ton rock!
Which one moves?

Obviously the force between them is a lot less than 1lb, but I'll leave you to work out.

« Last Edit: 15/04/2015 10:01:52 by Colin2B »

#### PmbPhy

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##### Re: Objects fall toward the greatest gravitational field in the region.
« Reply #2 on: 16/04/2015 17:06:06 »
Objects don't fall toward the greatest gravitational field in the region in general. Consider a satellite orbiting the Earth. It's not falling any closer to the surface of the Earth, where the gravitational field is stronger, while in orbit thus demonstrating your assertion to be wrong.

#### The Naked Scientists Forum

##### Re: Objects fall toward the greatest gravitational field in the region.
« Reply #2 on: 16/04/2015 17:06:06 »