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Intro to Physics Intro to Motion. Frame of Reference Distance vs. Displacement. What is Physics?. The study of the physical world The interaction of matter and energy through forces. Mechanics. The study of motion When studying motion, three questions need to be answered…

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intro to physics intro to motion

Intro to PhysicsIntro to Motion

Frame of Reference

Distance vs. Displacement

what is physics
What is Physics?
  • The study of the physical world
  • The interaction of matter and energy through forces
mechanics
Mechanics
  • The study of motion
  • When studying motion, three questions need to be answered…
    • Where is the object?
    • What is the object doing now?
    • What will the object be doing in the future?
where is the object
Where is the object?
  • Position: The separation between the object and some reference point.
  • Frame of Reference (Coordinate System): The context in which we study motion
    • Includes:
      • reference point
      • directional system
slide7
x = xf – xi
  • x = (85 cm) – (24 cm)
  • x = 61 cm
where is the object now where did it used to be
Where is the object now?Where did it used to be?
  • Displacement
  • The change in position relative to a reference point
    • x = xf – xi (Book uses d)
    • Which Unit?
vector quantities
Vector Quantities
  • Displacement is an example of a vector quantity
  • Vector quantities tell you
    • magnitude (how much?)
    • direction (which way?)
  • Vectors are represented by arrows on drawings
slide10
x = xf – xi
  • x = (24 cm) – (85 cm)
  • x = - 61 cm
where is the object now where did it used to be11
Where is the object now?Where did it used to be?
  • Distance: The length of the total trip taken between a starting point and an ending point
distance vs displacement
Distance vs. Displacement

Total Distance Traveled: 6 km

distance vs displacement track field examples
Distance vs. DisplacementTrack & Field Examples

Distance Traveled: 100m

Displacement: 100 m East

Distance Traveled: 400 m

Displacement: 0 m

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