# Gravitational Force of an object

• ElectroViruz
In summary, the conversation discusses the formula used by Sir Isaac Newton to calculate Earth's gravitational force and whether it can be applied to other objects. The concept of the gravitational constant, or 'G', is also mentioned, with the understanding that Newton did not discover its value and it was attributed to Cavendish. The conversation ends with appreciation for learning something new.
ElectroViruz
Just a little curious. What formula did Sir Isaac Newton used to find out the exact value of Earth's gravitational force ? Can we apply that formula to find out the gravitational force of other objects ? Let's say, calculating the gravitational force that my bottle has or our body. I know that the value in such objects with small mass would be minute, but I thought it'd be cool to know :)

## 1. What is the gravitational force of an object?

The gravitational force of an object is the force of attraction between two objects that have mass. It is the force that keeps objects with mass, such as planets, moons, and stars, in orbit around each other.

## 2. How is the gravitational force of an object calculated?

The gravitational force of an object is calculated using Newton's Law of Universal Gravitation, which states that the force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

## 3. What factors affect the gravitational force of an object?

The gravitational force of an object is affected by two main factors: the masses of the objects and the distance between them. The greater the mass of the objects, the greater the force of attraction between them. The farther apart the objects are, the weaker the force of attraction between them.

## 4. How does the gravitational force of an object vary on different planets?

The gravitational force of an object varies on different planets due to differences in their masses and sizes. The larger the planet's mass, the stronger the gravitational force. The closer an object is to the planet's center of mass, the stronger the gravitational force will be.

## 5. Can the gravitational force of an object be negative?

No, the gravitational force of an object cannot be negative. The force of gravity is always attractive, meaning it pulls objects towards each other. It can only have a positive value.

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