P1
- Units and Basic quantities
- there are 3 basic quantities to measure in in physics
- length
- mass
- time
- there are 3 basic quantities to measure in in physics
- Length
- length is measured in metres (m)
- 1 decimeter (dm) = 10^-1m
- 1 centimeter (cm) = 10^-2m
- 1 millimeter (mm) = 10^-3m
- a multiple for larger distance is:
- 1km = 10^3m (5/8 mile approximately)
- length is measured in metres (m)
- Area
- area = length x breadth
- area is always squared
- Volume
- it is measured in cubic meter (m^3)
- volume = length x breadth x height
- 1 liter = 1000cm^3 = 1dm^3
- one millilitre (1ml) = 1cm^3
- Time
the unit of time is the second (s)