Displacement
* Definition: Displacement is the change in position of an object. It's a vector quantity, meaning it has both magnitude (how far) and direction.
* Key Points:
* It's the straight-line distance between the starting point and the ending point.
* It doesn't care about the path taken, only the overall change in position.
* Can be positive, negative, or zero.
* Example: Imagine you walk 5 meters east, then 3 meters west. Your displacement is 2 meters east (5 - 3 = 2).
Speed
* Definition: Speed is the rate at which an object changes its position. It's a scalar quantity, meaning it only has magnitude (how fast).
* Key Points:
* It's calculated as distance traveled divided by time taken.
* It doesn't consider direction.
* Always a positive value.
* Example: If you walk 8 meters in 2 seconds, your speed is 4 meters per second (8 / 2 = 4).
Key Differences
| Feature | Displacement | Speed |
|----------------|-------------|-------|
| Quantity | Vector | Scalar |
| Direction | Yes | No |
| Path Dependence | No | Yes |
| Units | Meters (m) | Meters per second (m/s) |
In Summary:
* Displacement tells you how far and in what direction an object has moved from its starting point.
* Speed tells you how fast an object is moving without considering its direction.
Example to Tie It Together:
Imagine a runner on a circular track. They run one complete lap, returning to their starting point.
* Displacement: Their displacement is zero because they end up in the same place they started.
* Speed: Their speed is not zero because they traveled a significant distance around the track.
