* Speed is how fast an object is moving. It only tells us the magnitude (the amount).
* Velocity is how fast an object is moving *and* in what direction. It tells us both magnitude and direction.
Can a book have consistent speed and changing velocity? Absolutely!
Here's how:
* Imagine a book moving in a circle at a constant speed. The book is always moving at the same rate, but its direction is constantly changing. Therefore, even though its speed is constant, its velocity is changing.
* Another example: A book moving in a straight line at a constant speed, then abruptly changing direction. This would maintain a constant speed but would cause a change in velocity due to the change in direction.
In summary:
* Constant speed means the object is moving at the same rate.
* Changing velocity means the object's speed or direction (or both) is changing.
It's possible for a book to have constant speed and changing velocity, as long as its direction is changing!