When analyzing a position time graph the steepness of the slope tells us:

In a position-time graph, the velocity of the moving object is represented by the slope, or steepness, of the graph line. If the graph line is horizontal, like the line after time = 5 seconds in Graph 2 in the Figure below, then the slope is zero and so is the velocity. The position of the object is not changing

Explanation:

explanation:

newton's third law, for every action there is an equal and opposite reaction.