1. Agenda 1) Warm-Up (5 min) 2) Safety Symbol Quiz (5 min) 3) Physics Vocab. Words (10 min) 4) Intro. to Linear Motion (10 min) 5) Linear Motion Notes (10 min) 6) Physics Board Notes (15 min) 7) Formula Sheet 8) Speed & Velocity WS (30 min) 08 -29- 11 Mathematics TESTABLE

2. Safety Quiz NO TALKING!

3. Notes/Handouts Notes/Handouts Quizzes Quizzes Daily work Daily work Labs Labs Misc. Misc.

4. 1.Speed: measure of how fast something is moving. 2.Average Speed: The average speed is defined as the total distance traveled divided by the total amount of time it took. 3.Constant Speed: speed that does not change 4.Elapsed time: time that has elapsed, or passed, since the beginning of the event.

5. Linear Motion

6.  Kinematics is the study of how things move, but does not address the question of why they move.

7.  The study of why things move is called dynamics.

8.  Therefore, the “general” term for the study of motion MECHANICS  Kinematics + Dynamics =MECHANICS

10. Understanding physics begins with motion or the study of displacement. A.Terms related to motion -changing the position of a moving object in a particular direction is called magnitude. Displacement has vector (quantity) & direction & so a vector quantity, represented by a straight line segment from 1 point to another.

11. - Relative motion is the displacement of an object in relation to objects considered stationary & can either be motion in a straight line, or a curved line (path). We will examine straight line motion first.

12. TERMS RELATED TO MOTION

13.  Displacement:  Displacement: change in position due to a “difference” in start position and final position  Distance + Direction = Velocity  Displacement is used with the term “velocity” EXAMPLE

14.  When we describe something in motion, we are comparing it to something else. Example: A car is driving 45 miles per hour: You only know it is moving because the road and trees around it are staying still.

15.  So, for motion to be found, there must be something that is stationary---called a reference point

16. I. –Speed (measure of how fast something moves) define as the time rate of motion. a. If speed is constant, a straight line graph will be found since at any randomly chosen interval, the same value would be given. Speed=distance/time b. Average speed-divide total distance covered by the elapsed time; does not include the different speeds & variations taking place.

17.  When you measure speed, it is based on the “TOTAL” distance covered  OR, “how far” an object has traveled in a given amount of time

18.  “per” means “every”  So, 45 miles per hour is saying that something moves a distance of 45 miles EVERY hour (distance/time)

19. c. – Instantaneous speed—speed at instant, can be determined easily by a speedometer.

22.  Velocity is a “vector” quantity, therefore it has direction  The main difference between speed & velocity---- velocity has direction and displacement EXAMPLE  Velocity has displacement (position) which means that there is an “initial” point and a “final” point- --d f or d i

23.  Velocity (speed in a given direction)-a vector quantity since velocity has magnitude & direction; may be a positive or negative value depending on the direction object is moving.

24. A. Average velocity- the total displacement divided by the total elapsed time. B. Constant velocity-constant speed (motion at same speed) constant direction (motion in a straight line) C. Changing or variable velocity-either speed or direction changes.

26. DUE TODAY: Safety Quiz Vocab. Chart (KEEP) Formula Chart (KEEP) DUE NEXT CLASS: Syllabus/Safety contract CALCULATOR Binder/folders/CALCULATOR SPEED & VELOCITY WS I SPEED & VELOCITY WS I “Less is only more where more is no good.” Frank Lloyd Wright