Here's why:
* Newton's Law of Universal Gravitation: This law states that every particle in the universe attracts every other particle with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them.
* Earth's Gravity: The Earth has a large mass, which creates a gravitational field around it. This field pulls objects towards the Earth's center.
* Acceleration due to Gravity: The acceleration due to gravity on Earth is approximately 9.8 m/s². This means that an object in free fall will increase its speed by 9.8 meters per second every second.
* Force and Mass: Force is related to mass and acceleration by the equation: Force = Mass x Acceleration.
Therefore, the force of gravity on a 1 kg mass is:
Force = 1 kg * 9.8 m/s² = 9.8 Newtons.
