- #1

Haris045

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- TL;DR Summary
- how and why can multiplication combine physical quantities to form a new physical quantity, to make an equation?

I am on a journey to not just understand how to manipulate physics equations but to understand why they work , and how they describe physical phenomena.

I understand how division combines physical quantities. I have this much physical quantity 'per' this much physical quantity. It puts 2 physical quantities in a ratio to describe a physical phenome e.g. velocity=distance/time, It makes sense.

I understand what multiplication does numerically. But I don't understand how it can combine physical quantities to form a new one.

Intuitively I see that multiplication means 'applied over' e.g. W=F*d a 'force applied over a distance' or d=s*t 'a speed applied over a certain time'. mass = density*volume 'a density applied over a volume'. But why

1)So my first question is why does multiplication have this property of combining physical quantities and forming a new one, what is the multiplication doing to these physical quantities.

2)How does the multiplication relate back to the physical phenomena (how can it combine 2 physical quantities to describe a physical phenomena using an equation)

3)what does it show in an equation (about how it is combing the physical quantises to form a new on) , what does it mean in the equation , what is it doing to the physical quantises to form a new one?

4)so I can see that multiplication means 'applied over' but why does it mean this?

Thank you for the help and sorry if I am being ignorant.

I understand how division combines physical quantities. I have this much physical quantity 'per' this much physical quantity. It puts 2 physical quantities in a ratio to describe a physical phenome e.g. velocity=distance/time, It makes sense.

I understand what multiplication does numerically. But I don't understand how it can combine physical quantities to form a new one.

Intuitively I see that multiplication means 'applied over' e.g. W=F*d a 'force applied over a distance' or d=s*t 'a speed applied over a certain time'. mass = density*volume 'a density applied over a volume'. But why

1)So my first question is why does multiplication have this property of combining physical quantities and forming a new one, what is the multiplication doing to these physical quantities.

2)How does the multiplication relate back to the physical phenomena (how can it combine 2 physical quantities to describe a physical phenomena using an equation)

3)what does it show in an equation (about how it is combing the physical quantises to form a new on) , what does it mean in the equation , what is it doing to the physical quantises to form a new one?

4)so I can see that multiplication means 'applied over' but why does it mean this?

Thank you for the help and sorry if I am being ignorant.