Question

What two quantities must stay the same in order for an object to have a constant velocity? A) The speed and kinetic energy must be constant. B) The speed and mass of the object must be constant. C) The speed and direction of travel must be constant. D) The force applied to and direction of travel must be constant.

Answer 1

The answer is C. The speed and direction  of travel must be constant.

Velocity is a vector. Meaning it is speed in a particular direction. Hope this helps!