How do you scale a quantity?

Answer 1

i think you mean a scaler quantity.

a scaler quantity is something that is measured without a directional component to it.

ie. mass, temperature, speed

it could be negative value but the negative means its value. you can use a scale to measure scaler quantity.

then there is vector quantities which have a direction to it.

ie. velocity

because something like velocity is 10m/s east OR -10m/s

here the negative it is not a value but a direction (if 10m/s is to the right then -10m/s is to the left)

don't confuse this with speed because speed is scaler it is just magnitude or value only.

velocity is the displacement over time so it have a direction aswell.

hope this helps