Question

explain the concept of mass , length and time.

Answer 1

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.

Answer 2

${\bf{\small{\pink{\underline{Mass}}}}}$

The mass per unit length is the linear density of a one-dimensional substance such as a wire or thread. ... Some of these are defined reciprocally in terms of the length of thread needed for a given weight (see specific weight

${\bf{\small{\pink{\underline{Length}}}}}$

The measurement or extent of something from end to end; the greater of two or the greatest of three dimensions of an object.

${\bf{\small{\pink{\underline{Time}}}}}$

Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future Time in physics is operationally defined as "what a clock reads".