Question

Question #c044d

Answer 1

Lets draw a figure representing the problem

1. A horizontal line on a V-T graph represents a `ul"constant"` velocity.
   Notice that in the horizontal line shown in blue, velocity does not change with time.

We know that the area bound by the line and the axes of a velocity-time V-T graph is equal to the displacement of the moving object during that particular time. Again see the blue line.
2. As such: A horizontal line anywhere above the time axis means motion in the `ul"velocity's"` direction

1. A horizontal line on the time axis means no motion.
   See the red line. Area under the V-T time graph is `0`. Also notice that for this line `"V"=0`.