Inertia is introduced on ly as a quantity connected to constant velocity along a straight-line path. Any moving object traces out a path through space and i n time. We can define this path as the axis of motion. If the path is curved, then so is the axis. We can draw an arrow of this magnitude at any point along the path and tangent to the path.
Velocity is positive if the displacement is in the positive direction.
Activity 2 Matching a Distance Graph Storage of data in Data B for comparison to that in Data A is a feature of the s oftware which will be used frequently. The graph associated with Data B can be hid den without losing the data. Figure II-6 shows an attempt to match the graph. Students should be encouraged t o try as many times as are necessary to get a good match. The match need not be perfect but only good e nough to indicate understanding.