Motion

1
Motion
2
Motion

• A change in position measured by distance and
  time.

3
How do we know that something is moving?
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Motion

• Motion can only be described in comparison to a
  frame of reference.
• Frame of reference a system of objects that are
  not moving with respect to one another.

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What is the most common frame of reference?
The Earth!
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Distance vs. Displacement

• Distance is the length of the path between two
  points.
• Displacement is the direction from the starting
  point and the length of a straight line from the
  starting point to the ending point.

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Distance vs. Displacement

• Ex rollercoaster
• -How would you describe distance?
• -How would you describe displacement?