Here's why:
* Gravity and Distance: The force of gravity is inversely proportional to the square of the distance between two objects. This means the farther away you are from the center of the Earth, the weaker the gravitational force.
* Earth's Shape: The Earth is not a perfect sphere, it's slightly flattened at the poles and bulging at the equator. This means the summit of Mount Everest is further from the Earth's center than sea level, resulting in slightly weaker gravity.
However, the difference in gravitational force between the summit of Mount Everest and sea level is very small, only about 0.3%. You wouldn't notice it unless you had very sensitive instruments!
