How does inertia cause the water to stay in the bucket

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Discussion Overview

The discussion centers around the concept of inertia and its role in keeping water inside a bucket when the bucket is spun vertically. Participants explore the principles of circular motion and the forces involved, aiming to clarify how inertia interacts with these forces in this specific scenario.

Discussion Character

  • Homework-related
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants express uncertainty about how inertia specifically contributes to the water remaining in the bucket during vertical spinning.
  • One participant suggests that it is not the water staying in the bucket, but rather the bucket staying around the water, indicating a different perspective on the interaction.
  • Another participant mentions the involvement of centripetal and centrifugal forces in the context of circular motion.
  • There is a discussion about the necessity of a force to maintain uniform circular motion, with implications that if this force is removed, the bucket would move tangentially and the water would fall out due to inertia.
  • A participant questions how the water would need to move to fall out of the bucket, seeking clarification on the relationship between inertia and the motion of the water.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and confusion regarding the mechanics of inertia in this context. There is no clear consensus on the explanation of how inertia operates in relation to the forces acting on the bucket and water.

Contextual Notes

Some assumptions about the nature of circular motion and the forces involved remain unexamined, and the discussion does not resolve the complexities of how inertia interacts with these forces in this scenario.

candypie90
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Homework Statement: How or why does inertia cause the water to stay in the bucket while spinning it vertically?

I know inertia is the tendency of an object to remain at rest or in a state of uniform motion, but I am not exactly sure how it causes the water to stay in the bucket while it is spinning in a vertical circle.
Homework Equations: -

[Moderator's note: Moved from a homework forum as it is about the basic principle.]
 
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What do you know about circular motions? Are they uniform? Which forces are involved?
 
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candypie90 said:
How or why does inertia cause the water to stay in the bucket while spinning it vertically?
You can look at it differently. It is not so much that the water stays in the bucket. It is that the bucket stays around the water. If any little bit happens to fly free, the bucket accelerates the rest of the water to catch up.
 
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fresh_42 said:
What do you know about circular motions? Are they uniform? Which forces are involved?
I know that centripetal and centrifugal forces are involved
 
candypie90 said:
I know that centripetal and centrifugal forces are involved
So if forces are involved, where do you get your uniform motion from? Something has to literally force the bucket on its circle. If this force no longer applies, the bucket will fly off and the water will react due to inertia. Cp. post #3.
 
The bucket has a tangential velocity so if i cut the rope attached to the bucket (this is the radius) it would fly off in what ever the tangential direction was. I am confused? So the water is moving with the bucket in a uniform circular motion but when the rope is cut the water will fall out in what ever the tangential direction was of the bucket?
 
candypie90 said:
I am confused?
How would the water have to move to fall out of bucket? How does inertia want the water to move?
 

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