* Distance from Earth's center: Gravity is an inverse square law, meaning the force of gravity decreases with the square of the distance between two objects.
* Higher Altitude = Further from Center: When you're on top of a mountain, you're further away from the center of the Earth compared to being at sea level. This means you experience a slightly weaker gravitational force.
* Mass of Mountain: However, there's a counteracting effect! The mountain itself has mass, and its gravitational pull adds to the Earth's. This effect is much smaller than the effect of increased distance from the Earth's center, but it still exists.
In summary:
* Distance from Earth's Center: The dominant factor is the increased distance from the Earth's core, leading to a slightly weaker gravitational force.
* Mountain's Mass: The mountain's mass exerts a tiny gravitational pull, making the overall force slightly stronger than at sea level, but this effect is minimal.
Important Note: The difference in gravitational force between sea level and the top of a mountain is incredibly small, and usually negligible for everyday purposes.