L10 Newton's 3rd Law

News/Aside

• MS#1 Mechanics: Newton's Perspective
• Physics Nobel Prize 2014: LED (光電) NB: 2010 (Graphene); 2009 (CCD)
• Chemistry Nobel Prize 2014: Microscopy (光電)
  • Super Resolution Microscopy (Hell)
  • Single Molecule Spectroscopy (Moerner)

Review

1. Finish Dynamics, 1-D motion, Knight viewgraphs from 6-72 (Friction)
2. Homework Question Knight 6.25
3. Homework Question Knight 6.21

Key Points

1. New Idea: Interaction Diagrams
2. Newton's 3rd Law
   • every force occurs as one member of an action/reaction pair
   • two members of an action/reaction pair
     • act on different objects
     • are equal in magnitude
     • are opposite in direction.

Knight Chapter 7 Newtons 3rd Law Slides

Key Skill Practice

1. Draw a motion diagram for B & G combined
2. Draw an interaction diagram for B and G
3. Draw FBD diagrams for B and G separately