I've been wondering.. If a person (A) is, say, on top of Mt. Everest, he would be moving faster than a guy (B) at the foot of the mountain since A is further from the center of the earth, but he would also be experiencing a weaker gravitational force than B. So, for which of the invidividuals would time appear to be travelling slower? In other words, can it be said that gravitation has a greater or lesser impact on time dilation than relative motion? Hope the question isn't completely nonsensical..