Presentation on theme: "Agenda Warm-Up 5 min Physics Vocab. Words 10 min Binder Set-up 5 min"— Presentation transcript:
1 Agenda Warm-Up 5 min Physics Vocab. Words 10 min Binder Set-up 5 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.WARM-UP:1) If vectors point in the same direction, , then how do you calculate the resultant?2) This vector is pointing in which direction? AgendaWarm-Up 5 minPhysics Vocab. Words 10 minBinder Set-up 5 minReview for Quiz 15 minVector Notes 10 minSpeed & Velocity WS II 40 minAdd the two magnitudes.NorthHOMEWORK DUE:Contracts & Folders
2 Vocabulary:Relative: Motion is relative; all measurements are measured from a starting point, reference point. Every measurement is measured relative to this point.Rate: a quantity divided by timeScalar: a quantity, like distance, only magnitude or size.Vector: a quantity, that has magnitude and direction
3 Binder set-up In front of dividers: Homework chart (orange) Formula chart (purple)SyllabusLab Safety RulesCoupon (green)Notes/HandoutsDistance & Displacement Notes IIDistance & Displacement Notes IPhysics Vocab. ChartSig. Fig HandoutLinear Motion Notes“About Science” NotesQuizzesDaily WorkLabsMisc.
4 Homework due September 6/7 1) Speed & Velocity WS II 2) Study for Quiz on 9/6 (A) 9/7 (B)
5 Review Linear Motion Speed & Velocity Distance & Displacement Unit 1.3Review Linear MotionSpeed & VelocityDistance & Displacement
7 Distance and Displacement Distance and displacement are two quantities which may seem to mean the same thing, yet they have distinctly different meanings and definitions.Distance (d) is a scalar quantity which refers to "how much ground an object has covered" during its motion.Displacement (d) is a vector quantity which refers to "how far out of place an object is from its original position"; it is the object's change in position.
8 Equal & Opposite Vectors Example A physics teacher walks 4 meters East, 2 meters South, 4 meters West, and finally 2 meters North.Even though the physics teacher has walked a total distance of 12 meters, her displacement is 0 meters.Yet, when she is finished walking, she is not "out of place" – i.e., there is no displacement for her motion (displacement = 0 m). Displacement, being a vector quantity, must give attention to direction.The 4 meters east is canceled by the 4 meters west; and the 2 meters south is canceled by the 2 meters north.Equal & Opposite Vectors
9 Position Location of the object at a specific time Positionfinal - Positioninital = displacement
10 Distance vs. Displacement You drive the path, and your odometer goes up by 8 miles (your distance).Your displacement is the shorter directed distance from start to stop (yellow arrow).startstop
11 What’s your VectorExplanationThe most important distinction between “distance” and “displacement” is that distance is a scalar and displacement is a vector.Scalars are simple magnitudes.___You fill in_____________________Vectors contain information about the magnitude (size) and direction of a physical observable.__________________Have students list scalar quantitiesMoney, Time, Energy, Objects, etc…From Geometry, what would we call a line that starts at a point, has a certain length, and points in one direction: ray06/14/05
12 Distance vs. Displacement EvaluationDistance vs. DisplacementHave students measure both distance and displacement on the treasure map(They will have to create a legend)06/14/05
13 Summary of Concepts Distance is the length of the path traveled. ConclusionSummary of ConceptsDistance is the length of the path traveled.Displacement is the length and direction of a line from start to finish.Position is a location relative to a point of reference.Motion is a change in position.Displacement is a vector quantity that contains both magnitude and direction.Slowly reiterate the important points and ask for questions. Remember to wait at least 3 seconds before moving on.Ask if there are any new vocabulary words that need to be redefined or written on the board (we all have to speak the same language)06/14/05
14 Speed is the distance traveled by a moving object overa period of time
18 How do we draw forces?With VECTORSDirections of vectors are usually defined as North, South, East, West
19 An arrow is used to depict a vector. VECTORSAn arrow is used to depict a vector.The arrow’s length represents the magnitude of the vector.The arrow points in the Direction of the magnitude
20 How do you get the resultant when we have 2 vectors going in the same direction ADD their magnitudesSUBTRACT their magnitudes
21 This “New Vector” is the Net Vector or RESULTANT
22 Draw vectors & solve the following: Example 1Draw vectors & solve the following:Determine the total displacement of a person moving 5.5m West, then 6.3m East.8 m5.5 m6.3 m
23 Example 2 (Write it down) Determine the total displacement of a person that is moving 4.5 m West, 5.6 m East and 8.1 m West.
24 Homework due September 5/6 1) Speed & Velocity WS II 2) Study for Quiz on 9/5 (A) 9/6 (B)
25 DUE TODAY:Vocab. Chart (KEEP)Distance & Displacement Notes II (KEEP)“One's mind, once stretched by a new idea, never regains its original dimensions.” Oliver Wendell HolmesDUE NEXT CLASS:Binder/folders/CALCULATORSTUDY FOR QUIZSpeed & Velocity WS II