Why does the weight of an object change? Why does matter have weight?

For the same object, its weight g = mass m * gravitational constant gg (on Earth).

However, g changes with the latitude of the earth. The g value is larger in the high latitude region and smaller in the low latitude area. Even if the mass of the object does not change, its g-value changes, and the weight (the magnitude of gravity) changes.

If it is on the Moon, the g value is only equivalent to 1 6 above the Earth, the mass remains the same, and the weight becomes smaller.

Another case is a change in quality. If the object has a chemical reaction, the product of the reaction may become gaseous and float away, making it lighter, or it may react with something in the air to form a heavier substance (e.g., iron rust).

To sum up, it is basically these two factors that affect the weight of an object.

The weight of gravitational force is a measure of force after action.

You're on Earth and you're on the moon and your weight is not the same, because gravity is different.

But the quality is constant.

First, the nature is different1. Mass: Mass is a physical quantity that measures the translational inertia of an object.

2. Weight: Weight is a measure of the magnitude of an object subjected to gravity, and it is a basic property of an object.

Second, the units are different1. Quality: The commonly used mass single digging brightness is microgram (ug), milligram (mg), gram (g), kilogram (kg), ton (t), etc.

2. Weight: The unit is Newton, in old China, catties and taels were used as the unit of weight, and pounds, ounces, and carats were also used as the unit of weight.

Third, the measurement method is different1. Quality: The quality is measured by a balance.

2. Weight: The weight is measured with a spring scale. Judgment.

Physically: Gravity is the force that causes an object to be subjected to due to the attraction of the earth is called gravity.

Mass refers to the amount of matter that an object contains.

The magnitude of the gravitational force is called the weight.

To sum up, gravity is a force that has a magnitude and direction, and weight only refers to the magnitude of the gravity force.

PS: The weight in life refers to the quality of the physical service.

No, the amount of quality refers to more than enough kilograms, and it has nothing to do with whether there is gravitational g.

Whereas, weight is the mass multiplied by g, i.e. back to m*g.

We answer that there is no distinction between weight and mass, which we often say in life, we regard it as the same, but in fact they have a relationship of g, that is, weight is equal to mass multiplied by the constant g.

To be precise, weight is a measure of physical gravity, and physical gravity is the mass multiplied by this g, g =, which is often specified as 10 in the calculation.

objectThe center of gravity is uniquely determined by the shape of the object

If the shape of the object has changed, then its center of gravity may change.

If the shape of the object does not change, then its center of gravity must not change!

As long as the object doesn't change, the center doesn't change.

When we place an object in a different place, its weight changes. Why is that? It turns out that the weight of an object is equivalent to the gravitational force on which the object is subjected, which is caused by the attraction of the earth to the object.

However, because the earth is constantly rotating, a kind of rotating centrifugal force is generated, so the gravitational force on the object is just equal to the combined force of gravity and the centrifugal force of rotation. Since the Earth is a slightly flattened elliptical sphere, the closer it is to the equator, the farther the ground is from the center of the earth, and the smaller the gravitational pull is. Therefore, the actual gravitational force of an object should be the weight of gravity minus the centrifugal force of rotation in the vertical direction.

So the weight of the same object, from the middle latitudes of the Earth to near the equator, will slowly decrease, and not remain the same.