Question

.The velocity time graph of a body is a straight line parallel to the time axis.
What does it signify ?

Answer 1

This means velocity isn't changing with time,there is motion in the body with a constant velocity in a fixed direction but acceleration is Zero.

Conclusion: Body is having constant velocity and the area under the graph will give displacement done by the body .

Answer 2

Answer:

constant velocity and zero acceleration.

Hope it helps you.