The gravitational force in the atmosphere is the same as the gravitational force anywhere else on Earth. The force of gravity acts on all objects, including those in the Earth's atmosphere.
Near the surface of the Earth, the gravitational force is approximately 9.8 meters per second squared (m/s^2), often rounded to 9.81 m/s^2, which is known as the acceleration due to gravity or standard gravity (g). This means that for every kilogram of mass, there is an attractive force of 9.8 newtons (N) pulling the object downward.
In the atmosphere, gravity is responsible for holding the air molecules close to the Earth's surface. The force of gravity acts on the air molecules, causing them to be pulled downwards. This gives rise to the phenomenon of atmospheric pressure, where the weight of the air above exerts a force on the air below.
However, it's important to note that the density and pressure of the atmosphere decrease with increasing altitude. As you go higher in the atmosphere, the number of air molecules per unit volume decreases. While the force of gravity remains constant, the overall gravitational effect on the air becomes less noticeable due to the decrease in the density of air molecules.
So, the gravitational force in the atmosphere is the same as on the Earth's surface, but its effects on the air become less significant at higher altitudes due to the decreasing density of the atmosphere.