Quote:
Originally Posted by ThirdWorld 
*** Your quotes from Einstein and Newton might be correct but in my view your deductions are not.
How can you arbitrarily say that acceleration is "pushing or repelling force"? What is that statement a logical deduction of?
If you pull the elevator you cause acceleration and likewise if you push it.
Incidentally gravity is caused by forces that originate from the object and act towards its center and this to me is sufficient description for them to be referred to as pulling forces as opposed to pushing ones that are thought to originate from a source external to the object.
Roger |
From the beginning of the 1st to the end of the 2nd page of Newton's three page Preface to The PRINCIPIA MATHEMATICA, Newton is discussing the motions of falling objects and orbiting planets. By way of his applied mathematical descriptions of the effects of the force of gravity. At this time, Newton offers the following statement about what causes the gravitationally induced motions of planets & apples, quote:
“For I am induced by many reasons to suspect that they may all depend on certain forces by which the particles of bodies, by some causes hitherto unknown, are either mutually impelled towards each other, and cohere in regular figures, or are repelled and recede from each other; which forces being unknown, philosophers have hitherto attempted the search of Nature in vain."
That quote and its extraction will henceforth be referred to here, as THE GRAVITATIONAL ALTERNATIVE. Not my gravitational alternative; Newton's Gravitational Alternative to be exact.