Answer :
The positive velocity at 0.0 s on the graph is equal to the mass moving upward and at the origin in 0.0 s.
Velocity is a vector quantity that has both magnitude and direction. Velocity can be positive and negative. Velocity is positive if the direction of motion is up and negative if the direction of motion is down.
On a speed-time graph, a horizontal (flat) line indicates that the object is moving at a constant speed. The diagonal straight line shows the speed of the object changes.
This question is an of choice
The mass moves down and at the origin at 0.0 s.
The mass moves up and at the origin at 0.0 s.
The mass moves upward but not at the origin in 0.0 s.
The mass moves down but not at the origin in 0.0 s.
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