The earth gravity plays a crucial role in the equations of fluid mechanics, because the density of fluids is a factor in the equation of Theorem Bernoulli

• The gravity or acceleration is measured meters / second ²)

on earth it is 9.81m / s ² at the poles and 9.78m / s ² at the equator (the effect of centrifugal force)

on the moon The gravity is de1.62m / s ²

• accélération g

According to the hypothesis: "Any force acting alone is proportional to acceleration" and considering that "the weight of an object (the force applied to it) is the force of gravity is determined as the acceleration of the mass of an object that gives the weight of the object.