The magnitude of gravity is related to the mass of the object. The reason is that it is better not to use the public test I mean the general situation, that is to say, when it comes to, Can you use junior high school knowledge to answer, what you say is very difficult to understand

The essence of gravity is gravitation. The result of gravitation test is proportional to the mass of two objects and inversely proportional to the square of distance. So when the mass of a large object (earth) is fixed, gravitation is proportional to the mass of a small object and inversely proportional to the square of distance

What is the relationship between gravity and position? What is the relationship between mass and position?

Gravity is related to position, mass is an attribute of an object, and has nothing to do with position

The gravity of an object is related to the mass of the object

Finding the formula of gravity
How much n is the mass of an object 50kg

G=mg=50*9.8=490（g=9.8)
Some topics give g = 10, for the convenience of calculation, if not give g = 9.8

The calculation formula of gravity

9mg (where G is gravity; m is mass; G is acceleration of gravity; g = 9.8n/kg in junior high school)

On the formula of gravity
Even if the acceleration a = DV / DT is defined according to the classical method, f = Ma does not hold
………………
F=m(dv/dt)+(dm/dt)v=ma+(dm/dt)v
1. Is the above formula a classical method to define acceleration a = DV / dt or a relativistic method?
2. G = mg seems to be another form of F = ma, so g = mg is only an approximation. What is the exact formula?
Even if the acceleration a = DV / DT is defined according to the classical method, f = Ma does not hold
………………
F = m (DV / DT) + (DM / DT) v = ma + (DM / DT) V from electrodynamics (Yang Shiping et al.) 101
In the theory of relativity, since velocity is related to mass and the function can be the derivative of time, f = m (DV / DT) + (DM / DT) v = ma + (DM / DT) v

Maybe the building owner is talking about the motion equation of particles in the gravitational field?
Specific in the next talent, also can't say
Generally, we need to use the principle of general relativity. The motion of a particle in the gravitational field is in accordance with the geodesic motion in the curved space caused by gravity. Of course, f = ma and g = mg are not correct
Refer to Weinberg in gravitation and cosmology for details
Mathematical basis for surface theory, can refer to a variety of differential geometry course

Formula of relation between gravity and mass

G (gravity) = m (mass) g (g = 10m / S2), thank you!

Weight 30n is gravity or mass?

30n is gravity
The unit of mass is kg
Welcome to mention it again

[comparison] the relationship between gravity and mass

Gravity and mass are two different physical quantities. Gravity is a force. An object of a certain mass will be subjected to this force on the earth's surface. The magnitude of the force (g) = mass (m) * acceleration of gravity (g). If the acceleration of gravity of an object of the same mass is different, its gravity is also different

What is the gravity of an object with a mass of 80 kg standing on the horizontal ground? What is the gravity on the moon?

G=mg=80kg*9.8N/kg=784N
The gravity on the moon is about one sixth that of the earth, so g month = g / 6 = 784n / 6 = 130.7n
If G = 10N / kg, then
G=mg=80kg*10N/kg=800N
The gravity on the moon is about one sixth that of the earth, so g month = g / 6 = 800N / 6 = 133.3n

The magnitude of gravity is related to the mass of the object. The reason is that it is better not to use the public test I mean the general situation, that is to say, when it comes to, Can you use junior high school knowledge to answer, what you say is very difficult to understand