Pendulum with Water-Filled Sphere: Does it Change the Period?

AI Thread Summary
The discussion centers on a pendulum consisting of a hollow sphere filled with water, which drains through a small hole as it swings. It explores whether the draining water affects the period of the pendulum's motion. The consensus is that the mass of the pendulum does not influence the period, as the period is determined by the length of the string and gravitational acceleration. However, the draining water could affect the pendulum's moment of inertia and potentially alter its motion. Ultimately, while the mass remains constant, the changing distribution of mass due to the draining water may lead to variations in the pendulum's behavior.
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A hollow spere, radius 0.20m is attached to the end of a 0.80m long string, hung vertically and used as a simple pendulum.


The sphere is filled with water. Suppose there is a small hole in the bottom of the sphere. As the filled sphere swings back and forth, water slowly drains.

Question: If this has no effect on the period explain why. If it does affect the period describe how the period changes and why.
 
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How does the period of a simple pendulum depend on its mass?
 
thats what i thought. I know that mass doesn't effect the period...i thought that the drainage might affect the motion.
 
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