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## Bulletin Board

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**Bulletin Board**• How many of you have e-devices that you can put apps on? • Example: Stop watch, Accelerometer, ... • Readings • Pages 4-8 in your textbook**Mechanics**The field of physics in which we study the motion of objects.**Kinematics**Explaining the “what” and the “how” of motion.**Kinematics**10 Km 5 Kg 29 seconds “math is the language of physics” ~Mr. West**Map of NTCS**stairs We are here: office stairs**Map of NTCS**stairs Use the tiles on the floor. Start here: office stairs**Map of NTCS**stairs Origin office stairs**Map of NTCS**stairs Origin 0 stairs**Map of NTCS**stairs 20 M 0 stairs**Map of NTCS**stairs 20 M [N] 0 stairs**Map of NTCS**20 M [N] 0 Vector**Map of NTCS**20 M 0 Scalar**When would we want to use a scalar and when would we want to**use a vector? Scalar VS Vector**Vector Application**chrome.angrybirds.com**Example of a scalar and a vector.**Distance VS Displacement**Distance**The length of the path taken from one point to another.**Displacement**The change in position of an object.**Tools to measure distance and displacement.**Pedometer VS Measuring Tape**Δd = 20 m [N]**Δd = + 20 m**What if I wanted to drive from ntcs to the Yorkdale mall?**-14 Km**What if I wanted to drive from Scarborough to the Yorkdale**mall? -14 Km +8 Km**Δd = (-14) – (+8)= -22**What does this value mean?**Will the value of our distance (scalar: magnitude) always be**the same as the magnitude of our displacement (vector: magnitude plus direction) in one direction?Yes – ANo – B**Will the value of our distance (scalar: magnitude) always be**the same as the magnitude of our displacement (vector: magnitude plus direction) in one direction?Yes – ANo – B**A stone is thrown vertically upward from the roof of a**building. Does the position of the stone depend on the location chosen for the origin?**A stone is thrown vertically upward from the roof of a**building. Does its displacement from where it started depend on the location chosen for the origin?**Which of the following statements about distance,**displacement, and position are alwaystrue? The displacement of an object is the length of pathtravelled. The distance travelled by an object is equal to its change in position. The position of an object is exactly the same as its displacement. The distance an object travels can be less than its displacement.**Which of the following statements about distance,**displacement, and position are alwaystrue? The displacement of an object is the length of pathtravelled. The distance travelled by an object is equal to its change in position. The position of an object is exactly the same as its displacement. The distance an object travels can be less than its displacement. None are true.. In A & B, switch distance/displacement. C is only true if you start from the origin. For D, displacement could be negative.**Explain why you get the same resultant displacement if two**displacements are added in the reverse order. Include diagrams to support your answer.**What is the difference between adding scalar quantities and**adding non-collinear vector quantities? Include an example.**With your group, create your own question about displacement**and record it in your group workbook. Be sure to include an answer.