How does mass have anything to do with gravity?

Question

I was watching a Vsauce video and learned that any two objects, like two baseballs, are attracted to each other because of their mass, and the bigger the mass, the more gravity an object has. What does mass have to do with gravity, and what causes gravity? Why does something just attract other things around it?

In: Physics

Answer 1

Your question made me research and learn about it. It’s funny because I didn’t do it at school… I guess I just needed the right incentive 🙂

I read this [answer](https://www.quora.com/How-is-gravity-generated-by-mass) and found it pretty interesting. Even due other people explained it great here so far

Since mass is an undefined, unexplained property, and always has been since it was introduced, physicists cannot answer: How is gravity generated by mass? However, answers abound. The reason why this occurs is because mass was arbitrarily made an undefined property. When mass was made an undefined property, disunity was immediately introduced into physics equations. The continue existence of fundamental disunity makes it possible for successful but partial theories to coexist. This flexibility results because the unexplained property of mass can be molded to fit into someone’s theory.

Mass could have been and should have been made a defined property along with force. Empirical evidence gives us guidance on how this can be done. The equation f/m=a shows the way by which mass can be made a defined property. The equation m=f/a doesn’t accomplish this because f=ma defined force. Solving the equation for mass cannot define mass because it would be a circular definition. However, f/m=a does contain guidance on how both force and mass can be individually defined. One must go directly to empirical evidence for definitions of both force and mass. Empirical evidence is represented by the letter ‘a’.

With regard to this question, there is no answer and will be no answer until mass is defined. I defined mass and have put it to work reproducing the equations of physics; but, all current highly favored theories are built with the undefined status of mass in their foundation. So, there seems to be little official incentive to define mass. However, there is no way to re-introduce fundamental unity into physics equations other than to go back and define mass. That will immediately regain fundamental unity for mechanics. For Thermodynamics defining mass will not be enough. Temperature must also become a defined property.