Scalar and vector quantities

• What are scalar quantities?

  Physical quantities with only magnitude
• What does magnitude refer to in physics?

  It refers to size or numerical value
• If a car travels at 22 meters per second, what is the magnitude of its speed?

  22 meters per second
• Which of the following is a scalar quantity?

  Temperature
• What defines a vector quantity?

  It has both magnitude and direction
• Which of the following is a vector quantity?

  Velocity
• What happens when you walk a distance of three kilometers without direction?

  You could end up anywhere on a circle
• If you walk three kilometers east, what does this represent?

  Exact displacement with direction
• How are vectors represented visually?

  With arrows indicating magnitude and direction
• How would you represent four kilometers north as a vector?

  As an arrow pointing north, four units long
• What does a negative vector indicate?

  It indicates a direction opposite to the positive
• How would you label a two-kilometer west vector as a negative vector?

  As minus two kilometers east
• What are the key differences between scalars and vectors?

  • Scalars: Only magnitude, no direction
  • Vectors: Both magnitude and direction