- #1

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- Summary:
- How do we define anything in physics ?

Hello everyone,

I was curious about how do we define a physical quantity and mathematical relation between them.

For example:

Work done is defined as product of force along the displacement and displacement i.e W=Fcos(theta)d.

Now this definition is given in books straightforward but my questions is how this definitions comes to be and why we define work as product of two quantities and not division of two quantities.

In general how do we choose a certain definition to be true and holds a particular relation between physical quantities.

I was curious about how do we define a physical quantity and mathematical relation between them.

For example:

Work done is defined as product of force along the displacement and displacement i.e W=Fcos(theta)d.

Now this definition is given in books straightforward but my questions is how this definitions comes to be and why we define work as product of two quantities and not division of two quantities.

In general how do we choose a certain definition to be true and holds a particular relation between physical quantities.