1. Exam 1

2. Exam 1 Formulas

3. Ch4 Dynamics: Newton’s Laws Descriptions vs. Explanations what? vs. why? What is Dynamics? Connection with motion What is a force? A swinging pendulum – make a list

4. Ch4 What makes a force a force: Newton’s Laws The 1st… History: Aristotle and Galileo 5 causes Natural vs. unnatural friction Hammer throw Relative Velocities: rest vs. constant v Relative Velocities Inertia and inertial frames, mass, weight 1684 AD “The violent Motion” “The mixt or Crooked Motion” “The naturall Motion”

5. Ch4 Newton’s Laws The 2nd… History: PlanetsPlanets Words, Picture, Equation Which requires a larger force: getting a small car up to 60mph or getting a large truck up to 60mph? The 3rd… History: PlanetsPlanets Interactions Labeling Which experiences a larger force when I jump: the earth or me?

6. Forces and FBDs How do we represent them? Free Body Diagrams: A Visual Representation Object as a point Vectors on the point Relative magnitudes Appropriate directions Well-chosen names Angles and coordinate systems Ch4