Presentation on theme: "Agenda 1) Warm-Up 5 min 2) Physics Vocab. Words 10 min 3) Binder Set-up 5 min 4) Review for Quiz 15 min 5) Vector Notes 10 min 6) Speed & Velocity WS."— Presentation transcript:
Agenda 1) Warm-Up 5 min 2) Physics Vocab. Words 10 min 3) Binder Set-up 5 min 4) Review for Quiz 15 min 5) Vector Notes 10 min 6) Speed & Velocity WS II 40 min 09 -02- 11 Add the two magnitudes. North
1.Relative: Motion is relative; all measurements are measured from a starting point, reference point. Every measurement is measured relative to this point. 2.Rate: a quantity divided by time 3.Scalar: a quantity, like distance, only magnitude or size. 4.Vector: a quantity, that has magnitude and direction
In front of dividers: Homework chart (orange) Formula chart (purple) Syllabus Lab Safety Rules Coupon (green) Notes/Handouts Distance & Displacement Notes II Distance & Displacement Notes I Physics Vocab. Chart Sig. Fig Handout Linear Motion Notes “About Science” Notes Quizzes Daily Work Labs Misc.
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.
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.
Location of the object at a specific time Position final - Position inital = 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). start stop
Explanation The 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. __________________
Conclusion Distance 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.
How do we draw forces? With VECTORS Directions of vectors are usually defined as North, South, East, West
An 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
How do you get the resultant when we have 2 vectors going in the same direction ADD their magnitudes How do you get the resultant when we have 2 vectors going in the same direction SUBTRACT their magnitudes
This “New Vector” is the Net Vector or RESULTANT
Draw vectors & solve the following: Determine the total displacement of a person moving 5.5m West, then 6.3m East 5.5 m 6.3 m.8 m
Determine the total displacement of a person that is moving 4.5 m West, 5.6 m East and 8.1 m West.
DUE TODAY: Vocab. Chart (KEEP) Distance & Displacement Notes II (KEEP) DUE NEXT CLASS: CALCULATOR Binder/folders/CALCULATOR STUDY FOR QUIZ STUDY FOR QUIZ Speed & Velocity WS II Speed & Velocity WS II “One's mind, once stretched by a new idea, never regains its original dimensions.” Oliver Wendell Holmes