Do rotating objects have inertia and why do objects have inertia?

Rotating objects have inertia, but the landlord's text may not be literal.

Inertia can be regarded as a material property determined by mass that maintains uniform linear motion, and can maintain uniform linear motion (including stationary) without external force; At the same time, the rigid body also has the property of maintaining a uniform rotation, if it is not subject to the external moment, it will maintain a uniform rotation or a stationary state, and the quantity to measure this property is the moment of inertia, which is obtained by the MR 2 integral.

Note, however, that, like mass, moment of inertia is a physical quantity that describes intrinsic properties, whether it is rotating or not, it exists, just as mass always exists; It is not necessary to rotate to maintain the property of rotation at a constant speed, and it is the same when it is at rest, just as there is inertia when it is at rest.

Only the blacksmith half a hundred is really the problem of the landlord. If the landlord is a high school student and is committed to physics competitions, you can take a look at the aspect of rotation dynamics. For example, the mass in rotational dynamics is replaced by "moment of inertia", the force is replaced by moment, the velocity is replaced by angular velocity, and so on.

By the way, write a formula for moment of inertia, i = product (mr 2), r is the distance from the axis of mass m.

Any object with mass has inertia, an object at rest has the inertia of rest, a moving object has the inertia of motion, and rotation should have inertia along the tangent direction.

Yes, inertia is an essential property of an object, and if there is mass, there will be inertia.

The quantity that measures the magnitude of the inertia of a rotating object is called "moment of inertia".

Both stationary and moving objects have inertia, and inertia is a property of an object.

Yes. Moving objects will have inertia.

Matter has inertia, if the earth stops rotating for 2 seconds, will it be thrown out by itself?

This is a property that an object has.

As long as there is quality, there is inertia.

Objects have mass, and mass is energy.

Inertia is a property of energy, energy has inertia (mass) and any inertial mass is attributable to energy. - Albert Einstein is.

So far, summarize the law. It's not deduced, it's summarized.

This is characteristic of physics, and of science now.

Truth be told, smart people would doubt whether the so-called "science" is really science. At the very least, it should be considered that all axioms, laws, and theorems are conditional and have limitations.

Therefore, there are also some sciences that cannot be proven, and this experience can only be summed up.

First of all, assuming that the axis is located on the axis of the cylinder, since the axis of the cylinder is highly symmetrical to the round town, the moment of inertia has nothing to do with the height, and it is the same as the moment of inertia of the disk, which is mr2 2, which is proved below

Let the radius of the bottom surface of the cylinder r, the height h, the mass m, and the density

m=ρπr2h

Take the volume element DM = 2 rhdr at R

dj=dmr2

Take the integral r on both sides

j=2ρπh∫ r3dr

MR2 2 So in this case, the moment of inertia has nothing to do with the height, if the shaft is not on the cylindrical axis, but parallel to the axis, then according to the principle of moment of inertia parallelism, the pulsation parallel axis j of the cavity can be known

For non-parallel axes, it is much more complicated and will not be introduced.

Peculiarly, when the cylindrical half-open rough diameter is not timed (becomes a rod), the vertical central axis J = MR2 12 vertical end axis J = MR2 3

Added: R and 0 at the points are the upper and lower bounds, respectively.

Inertia is the property of an object to resist a change in its state of motion. The inertia of an object can be measured by its mass. The greater the mass, the greater the inertia.

In Einstein's Principia Mathematica of Natural Philosophy, he defined inertia as: inertia, or the force inherent in matter, is a phenomenon of resistance. It is present in every object, comparable in size to the substance, and strives to keep it in its present state, whether at rest or in a uniform linear motion.

Why do moving objects have inertia? When riding a train or car, it is common to encounter involuntary leaning forward after sudden braking, or even accidents. Why is that?

It turns out that it is because the object has inertia. Objects have the property of maintaining their original state of motion, which is called inertia. In a moving train or car, people and cars originally have the same speed (state of motion), and when the state of motion of the car changes sharply during sudden braking, people still have to maintain the original state of motion (i.e., speed), so they tend to lean forward when braking.

The magnitude of inertia is expressed in terms of mass, and the more mass an object has, the greater the inertia. Empty vehicles and trucks traveling at the same speed are easy to brake when empty, and difficult to brake for heavy vehicles, because the inertia of the truck is large and the motion state is difficult to change. Basketball with small quality is difficult to play, while basketball with high quality is difficult to play.

The reason is that the high-quality basketball maintains its original state of motion, has a strong ability to stand still, and is not easy to change.

This statement is true. All objects have inertia because all objects have mass, and the magnitude of mass is related to inertia. An inertial fluid ruler is the property of an object to resist the alteration of its state of motion. The inertia of an object can be measured in terms of its mass, and the greater the mass, the greater the inertia.

Inertia is an intrinsic property of all objects, whether solid, liquid, or gas, whether the object is in motion or at rest. Everything has inertia.

Definition of inertia: We call the property of an object in a constant state of motion inertia. Inertia represents how easy it is for an object to change its state of motion.

The magnitude of inertia is only related to the mass of the object. It is relatively difficult to change the motion state of an object with a large mass, that is, it has a large inertia; The motion state of an object with a small digital-analog mass is relatively easy to change, that is, the inertia is small.

When you kick the ball, the ball starts moving, and because the ball itself has inertia, it will keep rolling until it is stopped by an external force. Any object has inertia at all times, and it has to maintain its original state of motion.

Newton's first law states that an object has a property that maintains its original state of uniform linear motion or rest, and we call this property inertia.

Newton's first law is also known as the law of inertia. The physical quantities that describe the inertia of objects are their mass. The greater the mass of the object, the greater the inertia, and vice versa.

Inertia is the property of an object to remain in its original state of motion, regardless of whether it is stationary, translational, or rotating. The inertia of an object was initially revealed by the principle of inertia, and all objects have inertia.

Inertia is an intrinsic property of the object itself.

1. Inertia (foreign name: inertia) is an inherent property of an object, which refers to the property of an object to remain at rest or in a state of uniform linear motion.

2. It is a degree of resistance to the change of the object's motion state, and mass is a measure of the inertia of the object. When the external force acting on the object is zero.

Inertia performance: 1. The object keeps its motion unchanged, that is, it remains stationary or moves in a straight line at a uniform speed; When the external force acting on the object is not zero, inertia is expressed as the degree of difficulty with which the external force changes the state of motion of the object.

2. The inertia of the object will not change at any time (by or without external force) and under any circumstances (rest or motion), let alone disappear.

Inertial Relativity:

1. The special theory of relativity proposed by Albert Einstein in 1905 in "On the Electrodynamics of Moving Bodies" is based on the inertia and inertial reference frame studied by Galileo and Newton. Although this epoch-making theory actually changed many of Newton's concepts, such as mass, leakage energy, and distance, Einstein's concept of inertia did not differ from Newton's original concept at all.

2. In practice, the whole theory is based on Newton's definition of inertia. But this also makes it possible for the relativity principle of special relativity to be applied only to inertial frames of reference. In this frame of reference, an object that is not subject to an external force must remain at rest or in a constant linear motion.

a. Inertia is a property of an object, and all objects have inertia at all times, so the object has inertia when it is not subjected to force, so a is correct;

b. The size of inertia is only related to the mass of the object, and has nothing to do with whether the object is subjected to force, whether it is moving, and whether it is moving at speed, so the greater the speed of the object, the greater the inertia, so B is wrong;

c. Inertia is a property of an object, and all objects have inertia at all times, so stationary objects also have inertia, so c is wrong;

d. The dust and the clothes are originally stationary, when the clothes are beaten, the clothes are moving, and the dust is still stationary due to inertia, and the clothes are separated, so the dust of the clothes is used by hand to use the inertia so d is correct

Therefore, AD is chosen

We know that any matter will emit photons in any situation, the mass volume life of the object is represented by the photon information, when the density of photon information around the object is large, its mass is large, and vice versa is small, and when the object is moving in a straight line at rest or at a uniform speed, the density of photon information around it is balanced, and this equilibrium must be broken to change its state of motion, that is, a force must be applied to change its photon information density (the mass is easy to change.

The small mass is not easy to change), so that the object has the property of inconvenience in maintaining its state of motion (the same can be said for objects with acceleration).