Here's why:
* 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.
When a body moves in a straight line, its direction of motion remains constant. In this case, the magnitude of the velocity (speed) and its direction are the same.
Example:
* A car moving at 60 km/h due east has a speed of 60 km/h and a velocity of 60 km/h east.
However, if the body is moving in a curved path, its direction changes, and therefore, its velocity and speed will not be equal. The speed will remain the same, but the velocity will change due to the change in direction.
