What we mean in physics definition (quantity or property)?

[ado sar]

Many books sometimes for example define energy as quantity and sometimes as property. Also the definition of energy is the ability to do work or the meter of the ability to do work ? we define for example force as a quantity or as some quality and then we quantify this ?

 

[jedishrfu]

Closing thread as this has been answered here already.

https://www.physicsforums.com/threads/what-the-equal-sign-means-in-physics.948886/

As an example, Energy is a measured quantity sometimes given in joules that can be a property of a moving object.