Data.

Data.

Data.

Data.

A change in the slope of a location-time graph of an object indicates a change in the radial component of its speed.

Normally a position-time graph is actually a distance-time graph where the distance of an object is measured from a fixed point called the origin.

The slope (gradient) of the graph is the radial velocity - or the component of the velocity in the radial direction - of the object. That is, the component of the object's velocity in the direction towards or away from the origin.

Such a graph cannot be used to measure the component of the velocity at right angles to the radial direction. In particular, an object going around in a circle would appear t have no velocity since its distance from the origin remains constant.

It is not a suitable form of graph. A circle graph can be used for showing the relationship between a variable and its component parts. It is not suitable for illustrating changes with height.

Yes. If it was disconnected, you could remove an edge from the component with the lower chromatic number. This wouldn't affect the chromatic number of the first component.