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If time is the x-axis as expected then the x-intercept would be zero movement of the velocity.
velocity
A velocity time graph is still a velocity time graph - no matter the degree of detail that you look at it.
How the speed of something changes over time.
Simply put, a velocity time graph is velocity (m/s) in the Y coordinate and time (s) in the X and a position time graph is distance (m) in the Y coordinate and time (s) in the X if you where to find the slope of a tangent on a distance time graph, it would give you the velocity whereas the slope on a velocity time graph would give you the acceleration.
The velocity of the object at time = 0
If time is the x-axis as expected then the x-intercept would be zero movement of the velocity.
The velocity at the starting point (when t = 0).
If you started at zero velocity, yes.
It means that the object was travelling away from or towards the point of reference with a velocity represented by the intercept at the start of the measurement, that is, at time t = 0.
velocity
Distance covered at a given time.
A velocity time graph is still a velocity time graph - no matter the degree of detail that you look at it.
How the speed of something changes over time.
take the slope of every change in the velocity time graph and plot it
Your acceleration vs. Time graph is the slope of your velocity vs. time graph
The Average Velocity on a position time graph or a velocity time graph.