How does inertia cause the water to stay in the bucket

[candypie90]

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.]

 

[fresh_42]

What do you know about circular motions? Are they uniform? Which forces are involved?

 

[jbriggs444]

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.

 

[candypie90]

What do you know about circular motions? Are they uniform? Which forces are involved?

I know that centripetal and centrifugal forces are involved

 

[fresh_42]

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.

 

[candypie90]

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?

 

[A.T.]

I am confused?

How would the water have to move to fall out of bucket? How does inertia want the water to move?