• Linear Displacement

  • Definition: When something (like a soccer ball or you) moves from Point A to Point B, it undergoes a displacement.
  • Think about it like this: if you move from the kitchen straight to your room, your displacement is the straight path you took.
  • It's all about how far and in which direction you moved.
  • It's a vector (a fancy term which means it has size and direction 🌍↗️).
  • Symbols: Δr or sometimes dr (change in position).
  • Measurements
    • Size: meters (m)
    • Direction: degrees (º) or radians (rad) OR coordinates like horizontal, vertical, lateral.

• Linear Distance

  • Definition: Just how far you went, without caring about the direction.
  • Imagine walking around your house randomly; the total steps you took = distance!
  • It's a scalar (it only has size, no direction 📏).
  • Symbol: d.
  • Measurement: meters (m).

🌍 Real World Example: Say you walked 10m straight towards the north to get ice-cream 🍦. Your linear displacement would be 10m north, but your linear distance is just 10m.

• Velocity

  • Definition: How fast and in which direction something's position is changing.
  • Think of it like this: if you're cycling straight down a road, your velocity tells you how fast and in which direction you're going.
  • It's a vector (has size and direction 🚴‍♀️➡️).
  • Symbol: v.
  • Measurement
    • Size: meters per second (m/s)
    • Direction: degrees (º) or radians (rad) OR coordinates.

• Speed

  • Definition: Just how fast you're going.
  • If you're on a skateboard, your speed tells you how quickly the scenery blurs by!
  • It's a scalar (only size 🚀).
  • Part of velocity (the size part).

🌍 Real World Example: Picture driving a car 60km/h straight east. Your velocity is 60km/h east, but your speed is just 60km/h.