FORCES IN TWO DIMENSIONS


5.1 - Vectors
ENGAGEMENT
  • Objectives:
  • Students will explain vector addition by examining the sum of two or more vectors using the graphical and component methods.

  • WARM-UP
  • - Displaced Person
  • A person walks 100m loses all sense of direction and walks another 100m, what is his displacement relative to his starting point. Consider drawing straight lines from the starting point to represent the person's displacement.

EXPLORATION
Can 2N + 2N = 2N?
    • Measure weight of Object reading (scale 1) reading (scale 2)
    • Collect and organize data
    • Analysis

EXPLANATION
Vocabulary terms to know...
    • components
    • vector resolution


  • Teach
  • What are vectors?
  • How do we add them?
  • Examples of vectors
  • Methods of adding: graphical, component method

  • ELABORATION
  • >> Classwork
    • - Flash Cards for ALL EQUATION & VOCABULARY TERMS.
    • - pp 1 - 4, pg 121
    • - pp 5 - 10, pg 125


  • Homework

  • EVALUATION


5.2 - Friction

ENGAGEMENT
  • Objectives:
  • Students will...- define the friction force, distinguish between static and kinetic friction ...in order to explain the concept of friction.


  • WARM-UP
  • - Is it better to have low friction or high friction between surfaces? Give example of each situation.
EXPLORATION

EXPLANATION
  • Vocabulary terms to know...
    • kinetic friction
    • static friction
    • coefficient of kinetic friction
    • coefficient of static friction

  • What is friction?
  • Two types of friction...
  • Two types of coefficients...
ELABORATION
EVALUATION
  • Explain the idea of friction