1, the essence of overweight and weightlessness

The essence of overweight and weightlessness comes from Newton's second law, that is, the acceleration of an object is directly proportional to the magnitude of the external force it receives and inversely proportional to its mass. When the acceleration of an object is upward, the resultant force on the object is upward. At this time, the supporting force of the bracket is greater than the gravity of the object, that is, the object is overweight.

On the contrary, when the acceleration of the object is downward, the resultant force acting on the object is downward, and the supporting force of the bracket is less than the gravity of the object, that is, the object is in weightlessness. Therefore, the essence of overweight and weightlessness is the relationship between external force and its quality.

2. The application of overweight and weightlessness

Overweight and weightlessness have many applications in daily life. For example, in the aerospace field, astronauts need to experience overweight and weightlessness to adapt to the gravity changes when the rocket is launched back to Earth. In amusement parks, roller coasters and other amusement facilities, overweight and weightlessness are also used to bring excitement and pleasure to tourists.

In addition, overweight and weightlessness are also widely used in elevator lifting and trampoline performances. Understanding the principle and application of overweight and weightlessness is helpful to better understand the essence and causes of these phenomena.

Experimental verification of overweight and weightlessness

In order to verify the principles and phenomena of overweight and weightlessness, scientists conducted a series of experiments. One of the most famous experiments is Galileo's falling body experiment. Galileo discovered through the experiment of free fall that the gravity of an object is directly proportional to its mass, and when the falling speed of the object increases, the gravity of the object remains unchanged.

This experimental result proves the principle and phenomenon of overweight and weightlessness. In addition, scientists have also verified the principles and phenomena of overweight and weightlessness through other experimental means, such as measuring and analyzing the acceleration and gravity of objects with measuring tools such as accelerometers and electronic scales.