quality
▪ Active gravitational mass and passive gravitational mass. The quality of an object also determines the extent to which it is affected by the gravitational field. Assuming that the distance from the mass of an object to another object of mass is that the gravitational force of the first object can be calculated by the following formula: where the gravitational constant is expressed, the value is 6.67 × 10-11 kg-1m3s- 2. This quality is often referred to as gravitational mass. From the 17th century has been experimentally proved that the inertia quality and gravity quality is equivalent, this principle in the general theory of relativity is called the equivalent principle. The special theory of relativity proves the relationship between matter energy E and its mass m. According to this relationship, an aggregate of many particles, whose mass may be greater or less than the sum of the individual masses of these particles. On the surface of the earth, the relationship between the weight of an object and its mass is the effect of gravity, latitude, altitude, and crustal density distribution (such as subsurface deposits), which is generally 9.81 m s-2. The weight of an object is related to the environment in which it is located, but its quality is not. For example, a mass of 50kg of objects on the surface of the earth is 491N, the same object in the lunar surface only 81N. ...