* Force of gravity is the attraction between any two objects with mass.
* Acceleration due to gravity is the rate at which an object falls towards the Earth due to gravity.
* 9.81 m/s² is the approximate value of this acceleration on Earth's surface.
What does 9.81 m/s² mean?
* m/s² stands for "meters per second squared," which is the unit of acceleration.
* This means that every second, an object falling freely towards the Earth will increase its speed by 9.81 meters per second.
Why is it not exactly 9.81?
* The actual value of acceleration due to gravity varies slightly depending on:
* Latitude: Gravity is slightly stronger at the poles and weaker at the equator.
* Altitude: Gravity decreases slightly with increasing altitude.
* Local geological formations: Variations in the density of the Earth's crust can also cause small changes.
Important Note: 9.81 m/s² is just an approximation used for most calculations. The actual value can vary, and it's important to be aware of this for precise measurements.
