Speed
* Definition: How fast an object is moving.
* Units: Meters per second (m/s), kilometers per hour (km/h), miles per hour (mph), etc.
* Focus: Only on the magnitude (amount) of motion.
* Example: A car traveling at 60 mph.
Velocity
* Definition: Speed with a direction.
* Units: Same as speed (m/s, km/h, mph, etc.), but always include a direction.
* Focus: On both the magnitude and direction of motion.
* Example: A car traveling at 60 mph east.
Acceleration
* Definition: The rate at which an object's velocity changes over time. This can be a change in speed, direction, or both.
* Units: Meters per second squared (m/s²), kilometers per hour squared (km/h²), etc.
* Focus: On the change in velocity over time.
* Examples:
* A car speeding up from 0 to 60 mph.
* A car slowing down from 60 mph to 0 mph.
* A car turning a corner at a constant speed (changes direction, thus velocity).
Key Points:
* Velocity is a vector: It has both magnitude (speed) and direction.
* Acceleration is also a vector: It has both magnitude and direction, indicating how the velocity is changing.
* Zero acceleration means an object is moving at a constant velocity (no change in speed or direction).
Analogy:
Imagine you're driving a car:
* Speed: How fast the speedometer reads (e.g., 50 mph).
* Velocity: The speed and direction (e.g., 50 mph north).
* Acceleration: How quickly the car is speeding up, slowing down, or changing direction (e.g., accelerating from 0 to 60 mph, braking to a stop, turning a corner).
