Here's a breakdown:
* Speed: How fast an object is moving. It's a scalar quantity, meaning it only has magnitude (e.g., 10 meters per second).
* Direction: The path the object is moving along. It's a vector quantity, meaning it has both magnitude and direction (e.g., north, south, east, west, or any combination of these).
Therefore, velocity is a vector quantity that describes both the speed and direction of an object.
Example:
* A car traveling at 60 miles per hour eastward has a velocity of 60 mph east.
* A ball thrown straight up with a speed of 10 meters per second has a velocity of 10 m/s upward.
Key Points:
* Velocity can be positive or negative depending on the chosen direction. For example, a car traveling east might have a positive velocity, while a car traveling west might have a negative velocity.
* Constant velocity means the object is moving at a constant speed in a straight line.
* Changing velocity means the object's speed, direction, or both are changing. This can be caused by acceleration or deceleration.
Understanding velocity is crucial in physics and other fields that involve motion, like engineering and astronomy.
