what is inertia

Inertia, in physics, is the property possessed by bodies to oppose a change in their state of rest or motion in which they are found. As such, inertia is the resistance offered by a body to the alteration of its state at rest or in motion.

Newton’s first lawalso called law of inertia or principle of inertia, states that an object will remain at rest or in uniform motion in a straight line, as long as its state is not altered by the action of an external force. Therefore, the greater the mass of the object, the greater the inertia, that is, the greater the resistance that the body offers to the alteration of its state.

In chemistry, inertness is the quality of some chemical substances of not reacting chemically in the presence of elements of other chemical species. An example of chemical inertness are noble gases and molecular nitrogen, whose formula is N2.

On the other hand, in geometry, moment of inertia either second moment of area, is a geometric property that is related to the addition of the products obtained by multiplying each element of the mass by the square of its distance from the axis. The greater the distance between the mass and the center of rotation, the greater the moment of inertia.

The moment of inertia is a magnitude that represents a length raised to the fourth power (L4).

Also, in health, the uterine inertia refers to the cessation or decrease of uterine contractions, this is what causes large bleeding after childbirth since uterine contractions allow the closure of blood vessels, the absence of them leads to serious complications which leads to the administration of antibiotics, surgery, and in very severe cases removal of the uterus.

In colloquial language, when an individual indicates that work, study or carry out any other activity out of inertia, refers to his lack of energy. For example: my daughter goes to university out of inertia.

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Synonyms of inertia are inaction, immobility, starvation, laziness, indifference, neglect. For their part, the antonyms are activity, diligence, dynamism, interest.

The word inertia is of Latin origin. inertia which means laziness, inaction, incapacity, etc.

Thermal and mechanical inertia

In physics, there are two types of inertia: thermal and mechanical. Thermal inertia is the property of the body to conserve its heat and release it little by little, reducing the need for air conditioning. This depends on the characteristics of the material: specific heat, density and mass. For example: building materials absorb heat during the day and expel it at night, maintaining constant thermal variations, reducing the need to use refrigeration equipment.

On the other hand, mechanical inertia is the ability of bodies to maintain the state of motion or rest in which they find themselves and depends on the amount of mass and the inertia tensor. In turn, this inertia is divided into rotational inertia It is related to the distribution of the mass of a body, the greater the mass of a body, the more difficult it is to rotate its body, and the translational inertia corresponds to the axis of rotation.