Yes me too lol i agree :)
Answer:
If the speed of an object is unchanging it means that it's traveling at a constant speed.
If the speed of the object increases or decreases it means that the speed is changing. That's why those options are not valid.
The average speed implies that the speed changes over time, but just the average remains the same. That's why this option is not valid.
If the forces on an object are balanced (or if there are no forces acting on it), this is what happens:
a stationary object stays still
a moving object continues to move at the same speed and in the same direction
Answer:
kinematics is the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.
the features or properties of motion in an object.