Physics (3rd quarter, Gr: 7)

• What is the focus of video one in the tutorial series?

  Distance and displacement
• What is the basis for determining if an object is in motion?

  Change in position over time
• What is a reference point?

  Starting point for measuring motion
• How is motion defined?

  Continuous change in position over time
• What is the definition of distance?

  Total length of the path traveled
• What type of quantity is distance?

  Scalar quantity
• What is the standard unit of distance in the International System of Units?

  Meter
• How do you calculate the distance traveled by an object?

  Add all lengths of the path covered
• What is the formula for calculating distance traveled?

  $s =$$d_1 +$$d_2 +$$d_3$
• What is the definition of displacement?

  Shortest distance between initial and final position
• What type of quantity is displacement?

  Vector quantity
• How do you find the displacement of an object?

  Measure distance between initial and final position
• Can displacement be equal to distance?

  Yes, when the path is a straight line
• Can displacement be greater than distance?

  No, it can only be shorter
• What happens to displacement if an object returns to its starting position?

  Displacement becomes zero
• Why is the displacement zero when returning to the starting position?

  Initial and final positions are the same
• What are the key differences between distance and displacement?

  • Distance: total path length traveled
  • Displacement: shortest straight line between points
  • Distance is a scalar quantity
  • Displacement is a vector quantity
• How do you visually differentiate distance and displacement in diagrams?

  • Distance: represented by broken lines
  • Displacement: represented by continuous lines
• What happens to distance and displacement when an object moves back to its starting position?

  • Distance: doubles
  • Displacement: becomes zero