There are two substituted carbon atoms. Discounting sterochemistry, in the substitutive nomenclature, the carboxy group has higher priority than the fluorine group. Thus, the framework is 2-fluorocyclopentane-1-carboxylic acid. Then, there is
a) a carbon bound to two other carbons, an hydrogen, and a fluorine.
Among the atoms around the stereogenic centre, fluorine, with an higher atom number than carbon, has highest priority within the CIP-rules now applied (labeled 1). Carbon 2 is of higher priority than the one labeled with 3 because (in the next layer), (one carbon and an hydrogen atom) is of higher priority than (two hydrogen atoms). We observe the substituents from the side opposite to convention, though; thus, the stereogenic centre is (S) configured.
b) a carbon bound to three other carbons, and an hydrogen.
Again, it is the second layer which offers decision about the priorities. Here, we already observe the stereogenic centre from the convened perspective. And if we think of the four atoms like a steering wheel, with the atom of lowest priority (here: hydrogen) in the back, it turns to the right hand side; the centre is (R).
Thus (1R,2S)-2-fluorocyclopentane-1-carboxylic acid is the name for the compound.
Note: The site's compilation resources for learning chemistry has a section dedicated to nomenclature, too. It equally mentions programs which you may use to draw and assign the CIP labels, too. Don´t worry, these assignments demand training, training, and training.