Foundations of physics (2)

• SI base quantities:

  Length

  mass

  time

  electric current

  temperature (kelvin)

  amount of Substance (mol)
• Derived quantitty of force: kgms^-2
• derived quantity of pressure: Nm^-2
• derived quantity of work done / energy: Nm
• derived quantity of power: Js-1
• derived quantity of Resistance : VA-1
• derived quantity of Potential difference: JC-1
• derived quantity of electric charge : As
• derived quantity of Frequency: s^-1
• Scalar quantity = magnitude but no direction (mass, time and direction)
• Vector quantity = magnitude and direction (acceleration, displacement, velocity).