Question

The graph describes the motion of an object

Answer 1

Answer:

Explanation:

Answer: the object moves with constant velocity from A to B. It remains stationary from B to C. It moves with constant velocity from C to D.

Answer 2

Answer: the object moves with constant velocity from A to B. It remains stationary from B to C. It moves with constant velocity from C to D.

Explanation:

This Position vs Time graph shows how the position $X$ changes with time $t$ and this is the definition of the velocity $V$. This can be expressed as:

$V=\frac{\Delta X}{\Deltat}=\frac{X_{2}-X_{1}}{t_{2}-t_{1}}$

In the first segment AB, if we take two points $(X_{1},t_{1})$ and  $(X_{2},t_{2})$ the resultant velocity will be the same if we repeat the same calculation with any two points in this segment. This means the object  is moving at constant velocity.

In the segment BC, there is no change of the position in time, therefore the object is stationary during this segment.

Finally, in segment CD, the object has the same behavior as segment AB, hence it is moving with constant velocity again.