Question

b. describe the line that should be added for an object that is not moving with respect to the chosen frame of reference.
keyboard help

Explanation:

For an object not moving (stationary) in a chosen frame of reference, the line representing its motion (e.g., on a position - time graph) should be a horizontal line. This is because the position of the object does not change with time. In a velocity - time graph, a stationary object would have a velocity of 0, so the line would be along the time - axis (y = 0, where y represents velocity).

Answer:

The line should be a horizontal line (in a position - time graph, position doesn't change with time; in a velocity - time graph, velocity is 0, so the line is along the time - axis).