Gravitational force is a special force in physics for a few important reasons.

First, it affects everything that has mass, no matter how big or small.

Whether it’s a tiny grain of sand or a huge planet, every object pulls on every other object. This pull depends on how heavy the objects are and how far apart they are.

This idea is explained by Newton’s law of universal gravitation, which can be summed up as:

$F = G \frac{m_1 m_2}{r^2}$

In this equation:

• ( F ) is the gravitational force between two objects.
• ( G ) is a constant that helps us calculate gravity.
• ( m_1 ) and ( m_2 ) are the weights of the objects.
• ( r ) is the distance between the centers of the two objects.

Next, gravitational force only pulls objects toward each other. It doesn’t push them away, which makes it different from forces like electromagnetism. Electromagnetism can both attract and repel things.

For example, Earth’s gravity pulls everything toward its center. This pull is what gives us weight. So, when you step on a scale, you’re really measuring how hard Earth is pulling on you because of gravity.

Finally, gravity is what keeps things like the Moon and planets in motion around each other.

The Moon goes around Earth because of gravity, just like Earth goes around the Sun.

This universal force affects everything in our daily lives and also how the universe is organized. That’s why understanding gravitational force is so important in physics.