* Speed is a scalar quantity, meaning it only has magnitude (how fast something is moving).
* Velocity is a vector quantity, meaning it has both magnitude and direction.
Can a particle have zero speed but non-zero velocity?
No. If a particle has zero speed, it means it is not moving. Since it's not moving, it cannot have a direction, and therefore, its velocity must also be zero.
Think of it like this:
* Imagine a car parked on a street. It has zero speed (it's not moving). It also has zero velocity because it's not going anywhere.
* Now imagine the car moving at a constant speed down the street. It has a non-zero speed. It also has a non-zero velocity because it's moving in a specific direction.
The key takeaway: Zero speed always implies zero velocity.
