- #1
Rishabh Narula
- 61
- 5
in particular f=Gm1m2/r^2?sorry if my question sounds very irrelevant.if f is proportional to m1m2 it implies f=some constant times m1m2.okay.at the same time f is inversely proportional to r^2 .so force = some other constant times 1/r^2.okay.but in most places i see that what is done is they take take the two proportional relationships with respect to f and say "THEY ARE COMBINED" into one which is f is proportional to m1m2 times 1/r^2 or f is proportional m1m2/r^2.im just not getting how those two proportional relationships "combine" to give that one relationship from which obviously the law of gravitation comes.Can you please explain why exactly two proportional relationships can be combined like that?also why doesn't it apply same way in f proportional to m and f proportional to a to give f proportional to ma and then f= k ma. why just f= ma? i really want to understand this.THANKS FOR YOUR TIME.