Physics - Spinning a bucket of water in a vertical circle

• candypie90
In summary, the two relevant physics ideas for spinning a bucket of water in a vertical circle are centripetal force and conservation of energy, as they explain how the water can go around the circle without spilling. The concept of centrifugal force is not necessary to analyze this scenario. Additional research and videos can provide further insights and ideas about the forces at play.
candypie90
Homework Statement
What are the two physics ideas of spinning a bucket of water in a vertical circle? would it be centripetal and centrifugal force?
Relevant Equations
F = mac = (mv2 / r)
F = mac = (mv2 / r)

candypie90 said:
Homework Statement: What are the two physics ideas of spinning a bucket of water in a vertical circle? would it be centripetal and centrifugal force?
Homework Equations: F = mac = (mv2 / r)

F = mac = (mv2 / r)
The question is rather vague. You would not use both concepts to analyse it, you wouid use one or the other. Please quote the question word for word as given to you.

haruspex said:
The question is rather vague. You would not use both concepts to analyse it, you wouid use one or the other. Please quote the question word for word as given to you.

Oh sorry, the exact question word for word is: What are two or more physics ideas which are relevant to spinning a bucket of water in a vertical circle?

Thank you.

candypie90 said:
Oh sorry, the exact question word for word is: What are two or more physics ideas which are relevant to spinning a bucket of water in a vertical circle?

Thank you.
Ok.
Certainly centripetal force. I would not mention centrifugal for the reason I gave.
Vertical implies a certain other force should be relevant, but not sure that it is an 'idea' in this sense.
Might be able to work a conservation law into it.
So far, it could be an empty bucket. How can you bring the water into it?

haruspex said:
Vertical implies a certain other force should be relevant, but not sure that it is an 'idea' in this sense.
I would think that an idea would be what relates this other vertical force to the centripetal force so that the water can go around the circle without spilling.

Don't guess. Do some internet research. Watch videos of buckets spinning in vertical circles. They come with explanations that should give you some ideas.

1. How does the water stay in the bucket when it is spun in a vertical circle?

When the bucket is spun in a vertical circle, the water experiences centripetal force, which is directed towards the center of the circle. This force keeps the water from spilling out of the bucket and allows it to maintain its circular motion.

2. What determines the speed at which the bucket must be spun to keep the water from spilling out?

The speed of the bucket is determined by the centripetal force required to counteract the gravitational force acting on the water. This force is a function of the radius of the circle and the mass of the water.

3. What happens to the water when the bucket is spun faster or slower than the required speed?

If the bucket is spun faster than the required speed, the centripetal force will be greater than the gravitational force, causing the water to be pushed towards the bottom of the bucket. If the bucket is spun slower than the required speed, the gravitational force will be greater than the centripetal force, causing the water to spill out of the bucket.

4. How does the shape of the bucket affect the spinning of the water in a vertical circle?

The shape of the bucket can affect the spinning of the water in a vertical circle. A narrower bucket will require a higher spinning speed to keep the water from spilling out, while a wider bucket will require a lower spinning speed. Additionally, a bucket with a conical shape will cause the water to spin faster at the top and slower at the bottom, creating a parabolic path.

5. Can the direction of the spinning affect the behavior of the water in the bucket?

Yes, the direction of the spinning can affect the behavior of the water in the bucket. When the bucket is spun counter-clockwise, the water will be pushed towards the bottom of the bucket, while spinning clockwise will push the water towards the top of the bucket. This is due to the Coriolis effect, which is the apparent deflection of objects moving in a straight path due to the Earth's rotation.

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