Why is mechanical energy the sum of kinetic energy and partial potential energy?

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 kinetic energy, gravitational potential energy, and elastic potential energy collectively as mechanical energy. It is mass and velocity that determine kinetic energy; It is the mass and height that determine the gravitational potential energy; The elastic potential energy is determined by the stiffness coefficient and the deformation.

Mechanical energy is simply the sum of kinetic energy and potential energy. Mechanical energy is a physical quantity that represents the state and height of an object. There is a conversion between the kinetic energy and the potential energy of an object.

In the process where only kinetic energy and potential energy are converted into each other, the total amount of mechanical energy remains p>

Kinetic energy and potential energy (specifically gravitational potential energy and elastic potential energy) are both mechanical energy.

Therefore, the mechanical energy of a system is equal to the sum of the kinetic energy and potential energy (gravitational potential energy and elastic potential energy) possessed by the parts of the system.

Note: It is the sum of kinetic energy and all potential energy, not part of the potential energy.

In fact, we would very much like mechanical energy to be just the kinetic energy of the motion of an object, but the energy embodied in this motion may be "refrigerated" due to the position of the objects due to the interaction between the objects, and we call this energy potential energy (e.g., gravitational potential energy under the action of a gravitational field, electric potential energy due to the position of an electric charge). In fact, there are only two forms of energy, kinetic energy and potential energy, and the two can be converted into each other. The essence of frictional heat generation is that the microscopic motion of the molecules of the object is more violent, and so on

Answer: Definition of mechanical energy at the high school level: The sum of the kinetic energy of an object and the gravitational potential energy is called mechanical energy, which is for the system (including springs).

Kinetic energy and potential energy of the object (the sum of the gravitational potential energy and the elastic potential energy of the spring, excluding other potential energy, such as molecular potential energy, electric potential energy, etc.).

Nothing is a definition.

Because kinetic energy and potential energy are collectively referred to as mechanical energy, mechanical energy is the sum of kinetic energy and potential energy.

Mechanical energy. Including kinetic energy and potential energy (w machine e potential + e motion) kinetic energy: The energy that an object has due to motion is called kinetic energy.

The mass and velocity of an object determine the magnitude of its kinetic energy, and the greater the mass and velocity of the moving object, the greater the kinetic energy. And all moving objects have kinetic energy.

Potential energy: Potential energy is further divided into gravitational potential energy.

and elastic potential energy.

The potential energy possessed by an object is called gravitational potential energy, gravity potential energy refers to the energy that an object has due to being lifted, and all objects that are lifted up are able to do work and have gravitational potential energy. The greater the mass of the object and the higher it is lifted, the greater its gravitational potential energy.

Elastic potential energy refers to the energy possessed by an object due to elastic deformation, and all objects that undergo elastic deformation are able to do work and have elastic potential energy.

For an object that undergoes elastic deformation, the greater the elastic deformation, the greater the elastic deformation it has.

Machinery is a general term for machines and mechanisms. Machinery is a general term for machines and mechanisms, machinery is a tool device that can help people reduce the difficulty of work or save effort, such as chopsticks, brooms and tweezers and other items can be called machinery, they are simple machinery.

A complex machine, on the other hand, is composed of two or more simple machines. These more complex machines are often called machines. From the point of view of structure and movement, there is no difference between mechanism and machine, and it is generally referred to as machinery.

The machinery has the following characteristics:

1.Machinery is a combination of man-made physical components;

2.There is a definite relative motion between the parts of the machine;

3.Machines can replace human labor to perform useful mechanical work or convert mechanical energy.

1: Mechanical energy is a general term for kinetic and potential energy, which is specifically related to the mass and velocity of the object, the height of the object being lifted, or the magnitude of the deformation. Its conservation law is that the total amount of mechanical energy does not change when only gravity or elastic force does the work.

2: The fog on the glass is because the temperature inside the room is higher than by the window. The hot water vapor in the room meets the small water droplets formed by the liquefaction of the cold glass and adheres to the glass (inner surface).