Posted: Jan 01, 2015 4:09 pm
by DavidMcC
Veida wrote:
DavidMcC wrote:
Veida wrote:That's completely irrelevant.

No, it isn't irrelevant, because without it, we would, indeed, be lighter in the daytime, with the sun's pull subtracting from the earth's.

No. This is simply not correct.

I don't know where you went wrong. If you couid show the math leading to this conclusion perhaps we can sort it out for you?

You will not be able to sort it out for me, because I am not wrong. All you need to realise is that the force of gravity is a vector, and that we are not usually in free-fall around the earth (in which case we would be weightless).

EDIT: Oh, and you also need to realise that there is such a thing as centrifugal force - the apparent force generated by changing to a rotating frame of reference.