Does an object have the same mass when placed higher than it does when it is placed low?

First of all, the quality remains the same, which everyone has said, let me tell you why it feels heavier in the height.

Because most of the sensory organs in the human pair are in the muscles, when the arm hangs, the bone is the main load-bearing organ, and the muscles are mostly in a relaxed state at this time, so it feels relatively "light" When the arm is raised flat, according to the moment relationship of physics, it will be concluded that the arm needs to give a considerable force to maintain the state of the object, which is that most of the muscles in the arm are contracted, so it feels more "heavy".

First of all, the quality doesn't change. Because:

Mass is a fundamental property of an object, independent of changes in the object's state, shape, or position in space.

Secondly, the weight is subject to change. It is related to the acceleration of gravity experienced by an object. There are big differences on different planets. Even on Earth, it can change (so small that it is usually ignored) due to changes in the height of the object from the center of the Earth or changes in latitude.

And what you say is heavier when you're high......?

Is it heavier to carry?

That's the question of the direction and point of action of the force. (These two and the magnitude of the force are called the three elements of force).

Quality is independent of spatial location. The landlord refers to gravity, g = mg, at a high place, although the mass of the object has not changed, but the higher the height, the smaller g is, so it will feel lighter to hold the object at a high place, and in space g is close to 0, it is basically not difficult to take the object.

4th floor. People say it's heavier. I didn't say that the quality was relatively large.

It should be the same, because, mass is a property of an object and has nothing to do with position. You can check it again

Mass is a property of an object, so it does not change.

Figure out the quality and weight.

It is slightly more important in the location.

The mass is the same, but the gravity is different, the reason is that the acceleration of gravity is different, but the difference is very subtle, how can the landlord feel the difference? Probably for psychological reasons!

Upstairs fart Mass is a fundamental property of an object, independent of changes in the object's state, shape, and position in space.

The landlord feels that the quality is high and it is completely psychological.

Above, it was heavy when it was posted, I'm sorry, I said fart on the first floor.

The quality does not change with the change of space, time, state, so it does not change.

The higher the air, the thinner and the less dense it is, according to the buoyancy calculation formula, the buoyancy of the upper part is less than the buoyancy of the lower part, so it is heavier at the high head.

h=1/2 g t^2

According to the formula, height determines time, and if the height is the same, the time is the same, and the height is different, and the natural time is different.

Because falling in the same place, they experience the same acceleration due to gravity.

Two objects with different masses fall from the same height and fall together, that is, at the same time, the falling height is the same, if the height is different, the higher object falls at a height equal to the height at which the lower object begins, and the object has not yet reached the ground!!

Take a look at the diagram below:

by h=1 2gt2

t=(2h/g)^1/2

Depending on the height, the two objects will land at different times.

Do the math yourself based on free fall.

Because the acceleration due to gravity is the same (about meters every square second).

According to the conservation of mechanical energy mgh=1 2mv 2 v=(2gh) 2 according to v=gt t=(2h g) 1 2, objects that fall freely from the same height will have the same landing time and have nothing to do with the mass of the object, so objects of different masses will fall freely from the same height and land at the same time.

Answer C analysis: The amount of material contained in an object is called mass, and mass is a property of the object itself, which does not change with the external conditions of the object The mass of the two objects is different, not because of their shape, position, state and other external conditions, but because of the difference in the amount of material contained in the two objects Dot: Mass is the amount of material contained in the object, and the mass does not change with external factors, but is only related to the object itself

a. All parts of the object are subject to gravity, from the effect point of view, we can think that the gravity of each part of the object is concentrated in one point, that is, the weight of the object is destroyed, and the center of gravity is not the heaviest point on the object, so A is wrong;

b. The relative position between the center of gravity and the object is constant, so B is wrong;

c. The center of gravity of the object and the mass distribution of the object are related to the shape of the object, and the center of gravity of the object with uniform mass cavity distribution and regular shape is in its geometric center, so C is correct;

d. The center of gravity of the object must be on its geometric center when the mass distribution is uniform and the shape is regular, so D is correct;

So choose CD

Because the mass is the amount of matter contained in the object, the mass of the substance has nothing to do with the external conditions, but only depends on the amount of the substance contained in the object itself, so the mass of the two objects is different, and it must be due to the difference in the amount of matter they contain

Answer C Analysis: The amount of matter contained in an object is called mass, and mass is a property of the object itself, which does not change with the change of the external conditions of the object, and the mass of the two objects is different because the amount of the material they contain is different, and it has nothing to do with their shape, position, state and other external conditions View the original post