TFAD

OPENING QUESTION: You've been in school for something like 12 or 13 years now. Think about ALL THEM THAR lessons that you've experienced, and recall one in particular (or one TYPE in particular) in which you really learned something remarkable.

    1. What about the lesson made it memorable?
    2. How did the teach set up the learning?
    3. What did you do in class that day?
    4. What did the teacher do or not do?

Please discuss with your team!

LEARNING OBJECTIVES: I will begin work on my Orbital/Circular Motion Teacher For A Day (TFAD!) project.

WORDS O' THE DAY:

  • Centripetal ("towards the center")
  • Centrifugal ("away from center")
  • Gravitational Constant: G = 6.674 × 10-11 Nm2/kg2
  • Period ("Time to complete one orbit")

FORMULAE OBJECTUS:

  • T2 ∝ A3: The square of the period (in years) of an object orbiting the sun is proportional to the cube of the average distance to the sun (in years). This is kind of archaic in that we rarely see the proportional symbol anymore.

  • T2 = a3: The square of the period (in years) of an object orbiting the sun is approximately equal to the cube of the average distance to the sun (in years). We MUST keep in mind this is an observational relationship. Although it gets us close (in most instances) it is not an exact value so the "=" sign isn't really appropriate although it is widely used.

  • MsT2 = a3: This version is still approximate but it allows us to substitute in the mass of *other* stars as long as we measure the mass of the other star in terms of the mass of the sun being 1.00

  • T2 = (4π2/GM)(a)3 = This version is much more accurate is often referred to as Newton's version of Kepler's Law. Notice ALL values must be in SIU

    • v2/r: centripetal acceleration
    • mv2/r: centripetal force
    • Fg = Gm1m2/r2: This is Newton's famous equation for gravitational attraction. The gravitational force between objects is found by multiplying the mass of each object by the "G" the gravitational constant divided by the square of the distance between those two masses in meters (square). Oddly enough, gravity is a very, very weak force. A simple bit of friction here on Earth causes objects to NOT be drawn together....we'll discuss at length

WORK O' THE DAY:

Please begin work on your TFAD (Teacher For A Day) lesson plan. Your goal is to create a lesson plan for teaching 1 (And ONLY 1) aspect of Circular Motion OR Orbital Motion taken directly from our Unit Learning Targets

You'll be using the basic Wolgemuthian Lesson Plan template (after all, you've seen it over 100 times now!)

This is due when you walk into class on Wednesday and yes, it's graded.

You will be graded on:

  • How well you address each of the lesson plan aspects
  • Originality
  • Creativity
  • Effectiveness in getting your learning target across to your students
  • Avoiding paragraphs of text -- that results in a *mandatory* 1 grade reduction (B- becomes C- for example)

TFAD Template (slides) is HERE