- #1
ellieee
- 78
- 6
- Homework Statement
- qn (di)-> the graph is a v-t graph, so shouldn't we say "constant velocity" instead of "speed"?
- Relevant Equations
- nil
Can you use speed and velocity interchangeably?
AI Thread Summary
Speed and velocity are closely related concepts, particularly in one-dimensional motion, where they can often be used interchangeably. Speed refers only to magnitude, while velocity includes direction, which is crucial for understanding motion. In a straight line, if speed is x, velocity can be either x or -x, but this relationship does not apply to other types of motion, such as circular motion. The discussion highlights the importance of accurately interpreting graphs, particularly velocity-time graphs, to determine the nature of the motion. Accurate labeling of such graphs is essential for confirming that the motion is indeed linear.
- #2
Doc Al
Mentor
- 45,578
- 2,437
Yes. It's better to describe it as constant velocity, as speed just describes the magnitude and not the sign. (I presume this is one-dimensional motion.)
- #3
Delta2
Homework Helper
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In motion in a straight line such as in your example, the concepts of velocity and speed are almost identical: If speed is x, then velocity will be x or -x. I repeat, this holds only in motion in a straight line, it does not hold for other motions e.g. circular motion.
- #4
ellieee
- 78
- 6
how can you tell it's in a straight line ?Delta2 said:
Last edited by a moderator:
- #5
Delta2
Homework Helper
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I can not infer it from the given data (the screenshot of the graph isn't complete, doesn't completely show the text that describes the graph), somehow I thought it was given to you.ellieee said:
- #6
Doc Al
Mentor
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Since they label it a velocity-time graph, where the velocity is constant it must be moving in a straight line. (Assuming it's labeled accurately.)ellieee said:
Here is what I tried
This question was actually asked in one of our engineering entrances.
The answer was 1D.
My teachers say that we have to use μₘ/fₘ to get to this answer. I cannot understand why. I'll be really glad if you could tell me the exact definition of power (numerically) that works in all scenarios.
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance)
My thoughts for the first case , one of them must be 12 volt while the other is 0
The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h.
So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
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