AngeloUMD
I think you need to address the sequence in reverse. First challenge yourself to use as little power as possible then see how much distance that takes if you wish, or where your sight picture of your approaching target would have been.
Helicopters by their very nature usually don't have surplus power for anything, so the the least power you use for everything the more employable you will be later to carry the most amount of load, either internal or external.
That means, learn how to bring the aircraft to a landing with the most amount of power margin unused and reserved for useful load.
Decelerate slowly, arrive with your rotor as high at half your rotors diameter (most efficient IGE hover height) as you gently pick up ground effect. Because you are still applying aft cyclic it will not accelerate forward but instead come to a hover where you then centralize cyclic (just prior this point measure your power) and then land.
Of course the take off technique is more important as you need to pick up the biggest load with minimum power and gently translate away to possibly a hot high destination where you may have to terminate your approach speed directly as you or your external touch down, your power margins having been eroded by the higher DA.
As far as physics is concerned, no need to get too deep, just learn how to operate the aircraft as well as if not better, smoother and more efficiently than others and you will be in good stead for future employment.
I often remark about one of our pilots once whom I swear never moved that damn collective a fraction as he lifted an external load at MAUW on a fifty foot strop and translated away, neither was there any discernible aircraft attitude change as he translated. He now flies big bells doing lots of lift work.
see - do it smooth and keep the f'n cyclic still, dead still.
cheers tet