Whether or not all objects have mechanical energy

Yes. Mechanical energy refers to the sum of gravitational potential energy, elastic potential energy, and kinetic energy, and yes. But the motion of the atom is also a manifestation of kinetic energy, and at the same time, it is also the ** of the internal energy of the object.

Theoretically, zero mechanical energy of an object can be achieved, but only at zero gravity and a temperature of sub-zero, i.e., absolute zero. In practice, such low temperatures cannot be achieved (see the encyclopedia "Absolute Zero" for details).

No. All objects have internal energy. Mechanical energy refers to the sum of gravitational potential energy, elastic potential energy, and kinetic energy. If an object is at rest on a zero potential plane without deformation, then its mechanical energy is zero.

Is there no mechanical energy if the mechanical energy is zero?Is there no temperature for objects below zero?

The presence or absence of this mechanical energy, as far as potential energy is concerned, mainly depends on your choice of zero potential surface, real objects are definitely there, and may exist ideally, such as gravitational potential energy, gravitational force from the center of the earth, theoretically there is no potential energy if it coincides with the center of the earth, but in practice it is almost impossible to completely coincide. Personally, I believe that all objects have mechanical energy.

It can only be said when the mechanical energy is zero and when it is not.

If it is necessary to define that there is no mechanical energy when the mechanical energy is zero, then it is true.

But this definition is not a bit far-fetched.

Not necessarily. Internal energy is the sum of the energy of all forms of motion of all microscopic particles in an object or a system composed of several objects (referred to as a system), and the most intuitive form of expression is temperature.

Mechanical energy is the sum of kinetic energy and potential energy, and here potential energy is divided into gravitational potential energy and elastic potential energy. We refer to gravitational potential energy, elastic potential energy, and kinetic energy collectively as mechanical energy.

Like a piece of red-hot iron, there is only internal energy, no mechanical energy. Internal energy and mechanical energy can be present at the same time, or not at the same time.

Internal energy is the energy possessed by the molecules inside the object, i.e., the microscopic particles, mechanical energy is the energy possessed by the macroscopic object, and internal energy and mechanical energy are two different forms of energy, which should be correctly distinguished

ek=mv 2, so if the velocity is 0, then the kinetic energy must be 0.

The gravitational potential energy is related to the selection of the zero potential energy plane, and when the object is in the zero potential energy plane, the gravitational potential energy is 0.

Inelastic deformation has no elastic potential energy.

So the mechanical energy of the object can be 0.

Mechanical energy includes potential energy and kinetic energy, potential energy has elastic potential energy and gravitational potential energy, gravitational potential energy is a derivative of gravitational potential energy, as long as two objects exist there must be a gravitational force to each other, unless you erase the whole frame of reference, but that is impossible.

The energy possessed due to motion is known as the kinetic energy of the object. The formula is: ep=(m*v2)2. The object can be stationary (relative), then the kinetic energy can be zero.

Kinetic energy must have speed.

Not necessarily. Mechanical energy is related to the mechanical motion of an object, such as being lifted, deformed, moving, etc.

In physics, the kinetic energy and potential energy of an object are collectively referred to as mechanical energy

So the answer is: kinetic energy; Potential energy

Mechanical energy is related to the mechanical motion of the whole object, and internal energy is related to the thermal motion of the molecules inside the object and the interaction between molecules

So the answer is: mechanical movement; thermal motion of molecules; Interactions between molecules

Mechanical energy is related to the mechanical movement of the whole object, internal energy is related to the thermal motion of molecules inside the object and the interaction between molecules, the forms of mechanical energy and internal energy are different, but the units are joules

Mechanical energy refers to the energy possessed by the object, and internal energy refers to the energy possessed by the molecules inside the object, the two are different forms of energy, but there are many similarities, the velocity, mass, and height of the object affect the mechanical energy of the object; The velocity of the molecule, the total mass of the molecule, and the relative height of the molecule affect the internal energy of the object

Kinetic energy and potential energy (gravitational potential energy and elastic potential energy) are collectively referred to as mechanical energy!

For example, if a car moving on the ground has only kinetic energy, and the potential energy is zero (with the ground as the reference plane), then the mechanical energy is equal to the kinetic energy; An airplane flying in the sky, that is, it has kinetic energy and gravitational potential energy, then the mechanical energy is kinetic energy and aggravating force potential energy; The kinetic energy of an object suspended by a spring is zero, there is gravitational potential energy and elastic potential energy, then the mechanical energy is gravitational potential energy plus elastic potential energy.

The kinetic energy and potential energy of an object are collectively referred to as the mechanical energy of an object, the energy possessed by an object due to motion is kinetic energy, the energy possessed by an object due to being lifted is gravitational potential energy, the formula for kinetic energy is: 1 2mv 2, the formula for gravitational potential energy is: mgh, in addition to elastic potential energy.