Question

When an object travels the same distance during each second, it travels with
speed. If the
changes during each second, it travels with changing speed.

Answer 1

When an object travels the same distance during each second, it travels with constant speed. If the speed changes during each second, it travels with changing speed (or variable speed).

The distinction is that constant speed means the object covers equal distances in equal intervals of time, while changing speed indicates that the distance covered in each time interval varies. This can occur due to acceleration or deceleration.