PHY-105 Lecture Notes: Chapter 2: Free Fall and Integration

  1. Introduction
  2. A comment on doing problems
  3. Show’em the Mastering Physics grade sheet
  4. The minimum is to do the Mastering Physics Problems and to review the problems done in class
  5. Review = Copy over and teach yourself why the problem was done that way.
  6. You should also be doing other problems at the end of the chapter
  7. Read through the single * problems – insure that you know what to do to solve them
  8. Write out the double * problems – keep a written record of their solutions to review for the exam
  9. Do a few of the triple * problems – keep their written solutions for review.
  10. Do some of the CALC problems.
  11. Ask questions in class if you cannot see the way through the solution
  12. learnAPphysics.com Example Problem
  13. Sign-up and work the problems – I do.
  14. You’ll see some of them on exams
  15. Quiz Announcement Similar to Problems 1.99 & 2.97
  16. How would you start to solve this problem?
  17. Molly and Matt’s Presentation of Problem 1.72
  18. Critique
  19. Assign Problem 2.66 to more students for presentation on Thursday.
  20. Two more problems on constant acceleration
  21. 2.33
  22. 2.77
  23. A couple of calculus problems
  24. Derive the formulae for the common derivatives of f(x) = x0, f(x) = v0t and f(x) = a0t2
  25. 2.7
  26. 2.76
  27. Freefall
  28. Class Experiment (?)
  29. Description of Free Fall as a constant acceleration motion
  30. Define Free Fall
  31. Contrast the Aristotelian View Point
  32. Cite the work of Galileo
  33. State g and illustrate its significance
  34. Example 2.6
  35. Example 2.7
  36. Example 2.8
  37. Velocity and Position by Integration
  38. Example 2.9
  39. Overnight HW assignment

PHY 105 Overnight Homework Assignment

Due Thursday 04 September

Name______

Solve the following problem on a separate sheet(s) and attach this cover sheet to the front to submit. This HW assignment will count as 10% of your Thursday lab grade.

A vehicle accelerates at a rate of a1from rest until it reaches a position designated as x1 (assume the vehicle started at the origin). After reaching x1 the vehicle immediately begins to decelerate at –a2 until it comes to rest at x2. Further, a1a2.

  1. Create carefully constructed graphs of
  2. a vs. t
  3. v vs. t
  4. x vs. t

Label all relevant points (times, positions, velocities, and accelerations), slopes, and indicate the significance of the area under the acceleration and velocity curves.

  1. Derive expressions for t1 and t2 in terms of x1, x2, a1, a2.
  1. Propose a real-life analog to this hypothetical motion. Be complete in the description of how the real-life analog is congruent to the proposed hypothetical motion above. (In other words, don’t just answer in a phrase, but answer in a short paragraph of 5 to 10 sentences.)