This document discusses distance and displacement as they relate to motion. Distance refers to how far an object has moved and is a scalar quantity described only by magnitude. Displacement refers to how far out of place an object is from its starting point and is a vector quantity described by both magnitude and direction. An example problem is given where an object moves between points A, B, and C, and the total distance covered and displacement magnitude and direction are calculated.

4. Chapter 2: MOTION
Lesson 1 Distance & Displacement

5. DISTANCE
• Distance is a scalar quantity that refers to "how much
ground an object has covered" during its motion.

6. • What is scalar? and what is its contrary?
• Scalars are quantities that are fully described by a
magnitude (or numerical value) alone.
• Vectors are quantities that are fully described by both a
magnitude and a direction.
• This will be discussed more on lesson 2.

7. DISPLACEMENT
• Displacement is a vector quantity that refers to "how far
out of place an object is"; it is the object's overall change
in position.

9. • Problem 1: An object moves from point A to point B to point C,
then back to point B and then to point C along the line shown in
the figure below.
• a) Find the distance covered by the moving object.
• b) Find the magnitude and direction of the displacement of the
object.

10. An object moves from point A to point B to point C, then back to point B and then to point C
along the line shown in the figure below.
a) Find the distance covered by the moving object.
b) Find the magnitude and direction of the displacement of the object.

12. • a) distance = AB + BC + CB + BC = 5 + 4 + 4 + 4 = 17 km
• b) The magnitude of the displacement is equal to the
distance between the final point C and the initial point A =
AC = 9 km
• The direction of the displacement is the direction of the
ray AB.