If water can't stick to a ball, how is the Earth round?

The Earth is round due to its gravitational force and the resultant equilibrium between the gravitational pull and the centrifugal force caused by its rotation. The shape of the Earth is not directly related to the ability of water to stick to objects on a small scale, such as a ball.

When water is on a small object like a ball, surface tension and adhesive forces can cause the water to stick. However, the Earth's size and gravity are on such a large scale that water adhering to objects like balls is not relevant to its overall shape.

On Earth, water naturally adheres to the surface due to gravity, conforming to the Earth's shape. Gravity pulls water towards the centre of mass of the Earth, creating a roughly spherical shape. This phenomenon is why large bodies of water, such as oceans, conform to the Earth's curvature rather than pooling at one point.

In summary, the Earth's round shape is due to gravitational forces acting on a planetary scale, rather than the ability of water to stick to small objects like balls.

Source: Some or all of the content was generated using an AI language model