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# Position-time graphs

Using position-time graphs and number lines to find displacement and distance traveled.

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• Can a displacement-time graph tell you what direction something is going? I was doing this question from school and it said something about the graph telling us that an object did not move north or south because there was a horizontal line on the graph. Help? (sorry if it doesn't make sense)
• yes it does. the positive side of y axis tells you that the body is moving forward or upward and the negeative side of the y axis tells you that the body is moving backwards or downwards
• Anyone here pursuing majors in physics and chemistry?

I wanted to ask is it really hard to pursue?
(Currently, I am in high school)

Well, I get very intrigued by
high advanced level physics and chemistry.

• mentioned the word 'Mississippi ' is it a unit or what does that mean?
• In the animation, he was just counting the number of seconds so he could make it accurate. To count seconds, some people say one Mississippi, two Mississippi, etc.
• At he says, "at 2 seconds we're at negative one." At, he says the unit is meters. How can it be negative meters? Didn't he say that distance can't be negative in a previous video?
(1 vote)
• if you see the table properly it is position time table not a distance time table. if we take 0 as our house and we denote left as negative and right as positive then we are 1 metres left which mean after 2 seconds we are negative one metre from house
(1 vote)
• seems like somebody is jumping from one position to another, like gymnast on a cable for example !
(1 vote)
• at he says it's not going up but he just said he said it's just going to a different position ..so doesn't that mean it went "up"?? plz help. Also change in position over time is velocity and in velocity, you have a direction as it is a vector quantity, so wouldn't be right to say it is going "up" or whatever direction/unit is on the graph.
(1 vote)
• It isn't actually going up, but the way the y-axis is drawn, it looks like it does. If you drew it like a number line, it would move from left to right. Remember, a graph isn't the literal pictorial description of what's happening, you'll have to interpret it by looking at which quantities are plotted on which axis.
To answer your second question, no, it won't be right because it isn't exactly going "up". However, it is going to the right which is depicted by the "+" sign! :)
(1 vote)
• hello this question is related to a project I have on position-time graphs. so the project is that we have to walk for a certain amount of time and map our walk so we can graph it on a p-t graph. but we also had to have orthogonal (angled) lines in our graph. so after that we had to make a p-t graph for the x and y directions separately. i know how to make a p-t graph for the x and y direction, I'm just not sure how to graph the angled lines in the x and y direction because it's angled and not on one single line in the x or y direction. can someone please help? if i worded this weirdly or you can't understand it, please let me know!!
(1 vote)
• This graph gives us information about the movement but, what else can it tell us?
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• Why is it p=m*v and not p=m*a?