i am just wondering that if i am paying Google money will they not let me come up the rankings so as not to lose their profits?
No.
It seems to me that, given the actual wording of the question, CrimsonGirl's very succinct answer can be read in two completely different ways. ;)
So, just to be clear, 'No' means:
'No, being an AdWords advertiser does not have any impact on your position within the SERPs. One does not effect the other in any way.'
AWA