RE: Is Gravity acting upwards or downwards?
August 2, 2015 at 4:11 am
(This post was last modified: August 2, 2015 at 4:28 am by Alex K.)
But yes, a heavier object would attract earth more and reach it sooner because earth approaches it.
The falling at the same speed is an idealized limit
mass(body)/mass(earth)->0
*and*
size(body)/distance from center of earth ->0.
The deviations though are as incredibly tiny as these ratios or even higher powers of them. The second of those arises already in Newtonian physics bc. the idealized situation that gravity acts on the "center of gravity" is only applicable if the acceleration of gravity is exactly the same throughout the objecf.
The falling at the same speed is an idealized limit
mass(body)/mass(earth)->0
*and*
size(body)/distance from center of earth ->0.
The deviations though are as incredibly tiny as these ratios or even higher powers of them. The second of those arises already in Newtonian physics bc. the idealized situation that gravity acts on the "center of gravity" is only applicable if the acceleration of gravity is exactly the same throughout the objecf.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition
