Page 15 - Physical Quantities

SI UNITS

DERIVED QUANTITY , DERIVED UNITS & SYMBOLS
OBJECTIVE:
Derived units are formed from multiplication and

To describe the division of the seven base units and other derived
Derived units and are unlimited in number

Quantities

Named units derived from SI base units

Dimension
Quantity Symbol Relationship
symbol

Area A Width x lenght m 2

Volume V Width x length x height m 3

Velocity u,v Displacement/time m/s or ms -1

Accelerate a Velocity/time m/s or ms -2
2
-2
Force F Mass x acceleration Kgms or N

Pressure p Force / Area Pascal

Work W Force x distance Joule or Nm

Power P Work/time J/s or Watt