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Reference Point Scalar Vector Position

Vocabulary to Know !. Reference Point Scalar Vector Position. Distance Displacement Speed Average Speed. Reference Point. Def : a point that all motion will be measured relative to the Starting Point This is the starting point. Two Types of Units. ____________:

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Reference Point Scalar Vector Position

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  1. Vocabulary to Know! • Reference Point • Scalar • Vector • Position • Distance • Displacement • Speed • Average Speed

  2. Reference Point • Def: a point that all motion will be measured relative to the Starting Point • This is the starting point.

  3. Two Types of Units • ____________: • Unit includes only objects magnitude (numerical value) Examples:____________________ • ____________: • Unit includes magnitude and direction Example: going 100 mph to the East Example:_____________________________________________________

  4. Two Types of Units • Scalar: • Unit includes only objects magnitude (numerical value) Example: speed, distance • Vector: • Unit includes magnitude and direction Example: going 100 mph to the East Example: Velocity, acceleration, force, displacement,

  5. Position • Def:____________________________________________________________ • Symbol =_____ • Unit = _______ • Scalar or Vector? • Use the position vs time graph to calculate the speed of the bug using s=d/t_______________

  6. Position • Def: a point some distance and direction from my reference point • Symbol = x • Unit = meters (m) • Scalar • Use the position vs time graph to calculate the speed of the bug using s=d/t_______________

  7. Distance • Def:_______________________________________________________________ • Example: If Dallas was 100 miles away and I drove to and from Dallas, what would be my distance? ?_______ miles to Dallas ?_______miles from Dallas Total miles driven (distance)?___________

  8. Distance • Def: refers to the total distance traveled • Example: If Dallas was 100 miles away and I drove to and from Dallas, what would be my distance? ?_______ miles to Dallas ?_______miles from Dallas Total miles driven (distance)?___________

  9. Displacement • Def:_____________________________ (Δx = xfinal – xinitial) =___________ – __________ Example: If Dallas was 100 miles away and I drove to and from Dallas, what would be my displacement? • Start point = ________ • End point = _________ • Displacement=____________

  10. Displacement • Def: Refers to the change in position (Δx = xfinal – xinitial) Finish pt – start pt Example: If Dallas was 100 miles away and I drove to and from Dallas, what would be my displacement? • Displacement would be zero • Start point = Houston • End point = Houston

  11. Distance Scalar or Vector Unit:________ Formula: ____________Used to find: _________ Symbol:_____ Displacement Scalar or Vector Unit:_________ Formula: _____________ Used to find: ___________ Symbol:______ Distance vs. Displacement

  12. Distance Scalar quantity Unit: m, km Total distance traveled Used to find Speed Symbol: d Displacement Vector quantity Unit: m, km Δx = xfinal – xinitial Used to find Velocity Symbol: Δx Distance vs. Displacement

  13. Distance vs. Time Graphs

  14. Speed • Def:_______________________________________________________________ • Scalar or Vector Quantity? • Unit:______________________ • Slope of the distance vs. time graph • Can be read directly off a speed vs. time graph • Symbol:____

  15. Speed • Def: How fast you change position (distance traveled per unit time) • Scalar Quantity • Unit: meters per second (m/s) • Slope of the distance vs. time graph • Can be read directly off a speed vs. time graph • Symbol: s

  16. Average Speed • Def:______________________________ • Scalar or Vector? • Unit: ________ • Symbol: _______ What is the average speed of object in graph? Use Rise over run __________________

  17. Average Speed • Def: total distance divided by total time • Scalar quantity • Unit: m/s • Symbol: s What is the average Speed? Rise over run 2m/4sec = .5 m/sec

  18. What is the speed of Light?? • The sun is ___________km from the Earth or _________ miles • It takes light _____seconds to travel from the Sun to the Earth in the vacuum of outer space. • What is the speed of light?? • S =______________ Memorize this number!

  19. What is the speed of Light?? • The sun is 150,000,000 km from the Earth or 93,000,000 miles • It takes light 500 seconds to travel from the Sun to the Earth in the vacuum of outer space. • What is the speed of light?? • S = 300,000 km/s Memorize this number!

  20. Slope Determines Velocity! Describe the motion in the following graphs based on slope using: “lesser”, “zero”, “greater” _________ velocity _________velocity __________velocity

  21. Slope Determines Velocity! Describe the motion in the following graphs based on slope using: “lesser”, “zero”, “greater” NO (zer0) velocity Slower velocity Faster velocity

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