Units of measurement
Basic Quantities are:
| Length (Meter, Foot) |
| Time (Second) |
| Mass (Kilogram, Slug) |
| Force (Newton, Pound force) |
Units:
| Basic quantities (force,
mass, length, time) are related by Newtons second law. |
| Units used to measure quantities are not all
independent. |
| Three of four units, called base
units, are arbitrarily defined and the fourth is derived. |
Units:
Systems of Units, (Summary):
Name |
Length |
Time |
Mass |
Force |
SI |
meter (m) |
second (s) |
kilogram (kg) |
Newton (N) |
US Customary |
foot (ft) |
second (s) |
slug (lb.s2/ft) |
pound (lb) |
Unit conversions:
Force:
1 lb = 4.4482 N
Mass:
1 slug = 14.5938 kg
length:
1 ft = 0.3048 m
|