- #1
eurekameh
- 209
- 0
If rod BD is fixed at collar C, it is not rotating, correct? Why is the angular acceleration being asked if it's not rotating?
Angular acceleration without rotation?
- Thread starter eurekameh
- Start date
AI Thread Summary
Rod BD is fixed at collar C, which implies it is not rotating, leading to confusion about the relevance of angular acceleration. The discussion clarifies that since the rod is sliding through the collar, it does have degrees of freedom, allowing for rotation. The collar's ability to rotate at point C adds complexity to the kinematics involved. Ultimately, the conclusion is reached that the rod is indeed rotating, affirming the need to consider angular acceleration in this context. Understanding the dynamics of the system requires recognizing the interplay between fixed points and relative motion.
If rod BD is fixed at collar C, it is not rotating, correct? Why is the angular acceleration being asked if it's not rotating?
- #2
schliere
- 32
- 1
It's not fixed at collar C, it's sliding through it. It if were fixed, there would be 0 degrees of freedom, and OB could not be rotating.
- #3
SHISHKABOB
- 539
- 1
it also looks like the collar can rotate at point C
- #4
schliere
- 32
- 1
This is also a kinematics problem, not an introductory physics problem, and involves using relative velocities.
- #5
eurekameh
- 209
- 0
Nevermind, it is rotating. Thanks!
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.
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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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