Homework: Fundamental Vs. Derived Quantities?

Question

Our physics book shows no damn answer to these questions given by my teacher...How ridiculous.
Sorry, I couldnt think of any other reference than this...I'm just a kid.

1) What's a Fundamental Quantity?
2) What's a Derived Quantity?
3) Difference of Fundamental to Derived Quantity?

Um..can you guys also list down the fundamental and derived quantities of their units?

Hey...best ones got 10 points!

Answer 1

hi,that is homework.i am only writing down links.u urself search and read otherwise it will be cheating.

Answer 2

Your teacher did not ask u a 'ridiculous' question.It is some thing u MUST learn.

The measurements in the physical world consist of three measures --weight,length and time measure (seconds)

These three measurements are measured in CGS system or MKS system or the imperial system.

CGS=centimeter gram second MKS meter kilo second.

The imperial system has the three basic measures of these three fundamental quantities.

Anything derived from these three quanities becomes the derived quantities.

eg.speed=km(length)/second (time)
ALL MEASURES IN PHYSICS COME FROM LENGTH WEIGHT AND TIME.

Good luck with ur home work. :)

Study of Physics needs a lot of APPLICATION of the person and thinking too.
From next time u figure it out urself ok?
Sorry I made a mistake,,,,the word mass should replace weight

Mass =fundamental quantity..learn the subtle diff between wt and mass sorry and all the best..

Answer 3

Mass is a fundamental quality. It is a basic property of matter: if you have matter, you have mass.
Weight, often confused with mass, is derived. Mass has to be in a gravitational field (other than it's own) to have weight. Mass accelerated by gravity (or under the influence of an accelating gravitational field, even if still) is weight.
Density is derived. You need mass and volume, two quantities, to derive density.
If you need two or more fundamental quantities to create a quantity, it is derived.
Many math and physics questions can be answered here:
http://www.khake.com/page47.html

Answer 4

The difference is really pretty simple. "Derived" quantities are just those that are made of combinations of "fundamental" quantities. The "fundamental" quantities are the simplest ones that we start with without breaking them down into anything else.

A list of all the fundamental and derived quantities and units will be pretty long! Your text surely has something like that in it someplace--look in the appendices or index.