WARM-UP:

1) What is the “universal” language of science?

2) The hypothesis must be ___________. (hint: how can a scientist do an experiment.)

Agenda1) 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 Sheet8) Speed & Velocity WS (30 min)

LEARNING GOALS: • A Scalar quantity has magnitude only.• A Vector quantity has both magnitude and direction.• Displacement is a change in position.• Velocity is a change in displacement.

HOMEWORK DUE:Signed contracts, Folders & CALCULATOR!

08 -29- 11

Mathematics

TESTABLE

Safety Quiz

NO TALKING!

DIVIDERS

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

VOCABULARY: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.

UNIT 2

Linear Motion

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

DYNAMICS

The study of why things move is called dynamics.

Therefore, the “general” term for the study of motion

Kinematics + Dynamics =MECHANICS

LINEAR MOTION NOTES

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.

Notes

-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.

Notes

TERMS RELATED TO MOTION

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

RELATIVE MOTION

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 becausethe road and trees around it are staying still.

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

NOTESI. –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/timeb. Average speed-divide total distance

covered by the elapsed time; does not include the different speeds & variations taking place.

SPEED AND DISTANCE

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

REMEMBER: “per” means “every”

So, 45 miles per hour is saying that something moves a distance of 45 miles EVERY hour

(distance/time)

Notes

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

Speed Graphs

VELOCITY AND DISPLACEMENT

VELOCITY AND DISPLACEMENT

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---df or di

NOTES 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.

NotesA. 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.

Velocity Graphs

DUE TODAY:• Safety Quiz• Vocab. Chart (KEEP)• Formula Chart (KEEP)

DUE NEXT CLASS:• Syllabus/Safety contract• Binder/folders/CALCULATOR• SPEED & VELOCITY WS I

“Less is only more where more is no good.”Frank Lloyd Wright