Question

Mass, length and time form a set of fundamental quantities.​

Answer 1

Answer:

Any mechanical quantity can be expressed in terms of three fundamental quantities, mass, length and time. For example, speed is a length divided by time. Force is mass times acceleration, and is therefore a mass times a distance divided by the square of a time. We therefore say that [Force] = MLT−2.

Answer 2

Answer:

because they are the main unit on which most derived unit depends