Hi there. It has been a while since I have written in my blog, but I can assure you I have not missed any important events to blog about. Before the wonderful Thanks giving long weekend, we did a very interesting activity in class, in our groups. We had learned slightly about d-t and v-t graphs, however the activity we did on Friday further expanded on what we had learned. We got to actually walk the graphs for ourselves so we could learn better. We also kept track of the six graphs we walked, and I will do my best to explain them as best as possible.
In a d-t(distance, time) graph, if you walk at a constant speed away from the sensor, you would get a positive slope pointing upwards from the origin. If you walk towards the sensor at a constant speed, your line would be a negative slope going downward away from the origin. If you do not move, it will appear as a horizontal line. Here are the three d-t graphs.
In a v-t (velocity, time) graph you can spot a relationship between the d-t and v-t graph. There are many directions you can consider when there is a change in speed. Depending on the direction you are walking, the line will slope upward or downward. When walking at a constant speed, you would get a straight horizontal line. If the line happens to be located at 0, it means that there is no movement at all. Here are the three v-t graphs we walked.
Make sure you know all these graphs and their relationships for upcoming tests!
Thanks,
-Peggy.
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