Question

MEDALL!! FAN!!
Provide three statements that demonstrate the importance of units when describing motion .

Answer 1

What exactly do you mean by units ?

Answer 2

Units as in units of measurement ?

Answer 3

yes

Answer 4

Oh, well:

1. The obvious that without units of measurement we would not be able to distinguish between magnitudes and elements that describe the laws of motion. If you work the exact distance that a car travels in 10 seconds in nanometers and you get to 300 000 nm (in your consideration) I could then interpret that your result is not a distance but a speed and that the car might be moving at 300 000 km/s (in my consideration) which would pretty much break physics in two since the car would then be moving faster than the speed of light. Consistency.

2. It makes it easier for scientists to communicate effectively between one another regardless of their country of origin. Imagine if every country was backwards like *cough cough* a certain country we know and insisted on using its own set of scientific notations apart from what everyone else in the world uses. We'd waste so much time converting from one system to another for no good reason. Communication.

3. Certain units of measurement have an easier and more distinguishable order magnitude depending on the motion of what is being studied. Through the use of units we can better express the motion of objects which go very fast or very slow, travel very much or very little without resorting to just one unit of measurement.For example, instead of saying that the distance between two carbon atoms in graphite is 0.000000000154 m it is easier to say that the distance is 0.154 nm. Convenience.