Chapter 2

Kinematics: Introduction to motion

Topics and Activities

 

  1. Concepts of motion
    1. Displacement (vector) vs. position

                                                               i.      Graphical understanding of motion

1.      Group activity: Introduction to Linear Motion diagrams as in Active Physics. Groups make graphs for a=0, v=0, v>0, v<0

2.      x vs. t graphs: Group Activity � not moving, constant v (steady motion)� graphs

                                                             ii.      Activity: Motion matching using DataStudio

    1. Speed vs. velocity (vector)

                                                               i.      Velocity as slope of x vs. t graph

1.      Average vs. instantaneous velocity

                                                             ii.      Activity: Velocity matching using DataStudio

    1. Acceleration (vector): Can you think of 3 different driving actions that accelerate a car?

                                                               i.      Acceleration as slope of v vs. t graph

1.      Average vs. instantaneous acceleration

                                                             ii.      Motion diagrams:

1.      a>0 vs. a<0 and v values

2.      Group activity: Active Physics 1.1

a.       Play with the simulation until you can correctly predict the motion

b.      Do question 7 problems 1,2,4

    1. Graphing x, v, a vs. t: Active Physics 1.3

                                                               i.      Questions 1-5 (time permitting)

  1. Predicting motion:
    1. Presentation of formulae (Lecture)

                                                               i.      1D motion � importance of coordinate systems in setup

    1. Group activity: Active Physics 1.4 � all questions (quick)

                                                               i.      Note importance of SIGN � gives direction in 1D for v and a

    1. Falling objects: constant acceleration example problems

                                                              i.      AP 1.7 Balloonist drops lemonade on assistant�s head

                                                             ii.      Check questions: Toss coin. What sign are a and v along path?

    1. Example problems on board
    2. Group activity: example problems from back of chapter

 

Chapter 2

Conceptual Questions: 6, 7, 13, 14

 

Practice Problems:� 19, 23, 25, 45, 57, 59

 

HW problems (Due Thursday 5 Sept.):� 20, 24, 28, 32, 40, 42, 60

 

Last update 28 August 2002 SLN