However, the exact force depends on a few factors:

* Mass: The more massive a person is, the stronger the gravitational force.

* Location: Gravity is slightly weaker at higher altitudes (like on a mountain) and slightly stronger at lower altitudes (like at sea level). The Earth isn't perfectly spherical, so there are also variations in gravity depending on your location on the planet.

To calculate the force of gravity (weight) on a person, you can use the following formula:

Force (weight) = Mass x Acceleration due to gravity

* Mass: Measured in kilograms (kg).

* Acceleration due to gravity: Approximately 9.81 meters per second squared (m/s²) on Earth's surface.

Example:

* A person with a mass of 70 kg on Earth's surface would experience a force of gravity (weight) of approximately 686.7 Newtons (N).

Important Note: While the force of gravity is always acting on us, it's often counteracted by other forces like the normal force from the ground, preventing us from falling through the Earth!