please solve this its physics question
Answers
Answer:
1) The four fundamental units we will use in this text are the meter (for length), the kilogram (for mass), the second (for time), and the ampere (for electric current). These units are part of the metric system, which uses powers of 10 to relate quantities over the vast ranges encountered in nature.
2)When a physical quantity expresses itself in terms of two or more fundamental physical quantities.
It is derived by multiplying or dividing one basic physical quantity with another basic physical quantity.
3) Acceleration is more fundamental than velocity or position or even time, which are all relative quantities; yet its units are derived from those. ... For acceleration, it is equal to displacement (distance, a base quantity) divided by time (base quantity) squared, or velocity (derived quantity) divided by time.
4)physical units Units used in measuring physical quantities. ... Other masses are measured by weighing them and comparing them, directly or indirectly, with this. Units are of two types: base units that, like the kilogram, have fundamental definitions; and derived units that are defined in terms of these base units