Measurements and Units

• the prefix 'mega' means 10^6 or 1000000
• The SI unit for force is newtons (N)
• The SI unit for mass is kilograms (kg)
• a vector quantity possess both magnitude and direction.
• scalar quantities only have magnitude
• Fundamental /Base quantities (METTALL)


  mass, electric current, time, temperature, amount of substance, length, luminous intensity.
• milli means 10^-3
• unit of density : kg/m3 (kgm^-3)
• unit of power: W or Js-1
• unit of moment of a force : Nm
• Unit of momentum: kgms-1
• The fundamental quantities are all scalar quantities.
• units of pressure: Pa or Nm-2 or Kgm-1s-2
• unit of energy : J or Nm or Kgm2s-2