1. Chapter 3 - Forces
Vector Drawing

2. 3.4 Scalar and Vector
quantities
• Scalar quantities are physical
quantities that have only a magnitude
• Vector quantities are physical
quantities that have a magnitude
and direction

3. 3.4 Scalar and Vector
quantities
• Examples of Scalar and Vector
Quantities
Scalar quantities Vector quantities
Time Weight
Mass Velocity
Speed Acceleration

4. 3.5 Vector Diagrams
• One good way to represent a vector
quantity is by means of an arrow
• The magnitude of the vector is
represented by the length of the
arrow and the direction is represented
by the direction of the arrow.

5. 3.5 Vector Diagrams
• Hence for vector drawing, we require a
scale