Minimum Speed for the Water to not spill

AI Thread Summary
When a bucket is spun rapidly, the centripetal force generated keeps the water inside despite the downward acceleration due to gravity. The tension in the bucket's handle can be considered zero at the top of the spin, as the water's inertia prevents it from falling out. The key factor is the speed of rotation, which must be sufficient to create enough centripetal force to counteract gravity. This balance allows the water to remain in the bucket without spilling. Understanding these forces clarifies why the water does not fall out during rapid spinning.
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How is it that the water in a bucket, spun fast enough, does not spill?
The formula at the top would be Total Force = Tension + M*g right?
So would the tension be let as 0? If so, why? I can't understand how the water just simply does not fall out of the bucket :confused:
 
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because the bucket is technically accelerating downwards just as fast as gravity is accelerating the water in the bucket (in otherwords, the bucket is keeping up with the water).
 
rcgldr said:
because the bucket is technically accelerating downwards just as fast as gravity is accelerating the water in the bucket (in otherwords, the bucket is keeping up with the water).

oooh I get it :) thanks!
 

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