👉 Pre-convention, also known as pre-conditions or initial conditions, is a concept in physics and engineering that describes a set of conditions under which an object behaves according to its properties. These conditions are usually given in advance and include factors such as mass, velocity, acceleration, temperature, and other parameters. In the context of mechanics, the pre-convention assumption often refers to the initial conditions or starting values of objects when they are first introduced into a system. It is typically stated that these conditions