What does gravity g mean?

Gravity g is the acceleration of an object in the gravitational field, also known as gravity acceleration. Refers to the increasing speed per second when an object falls freely under the gravity of the earth or other celestial bodies. On the earth's surface, the acceleration of gravity is usually defined as 9.8 1 m/s 2, which is the measurement result of the earth's gravity field. Gravitational acceleration can be used to describe the velocity and trajectory of different objects falling freely, so as to further study the mechanics and physical laws of the universe.

Why is the g value of gravity 9.8 1 m/s 2?

The value of gravity acceleration depends on the mass and radius of the earth. Because the earth is an approximate spherical volume, the gravity on the earth's surface is equivalent to a centripetal force, and its size is inversely proportional to the mass and radius. Knowing the mass and radius of the earth, we can calculate the value of gravity acceleration. The value of 9.8 1 m/s 2 is approximate, and it is also affected by altitude, earth rotation and other factors.

What effects does gravity G have on daily life?

Gravity g has a great influence on human life. It determines the maximum weight of objects that can be supported and moved, such as elevators, rockets and cars. Gravity g also determines the friction between people and objects and the stability of the ground. Gravity G is also the basis of people's skydiving, gliding and other sports. Gravity g even affects the earth's atmosphere and weather system. So gravity g can be said to be an indispensable part of people's lives.