Ice buildup on tidal locked planet.?

Question

Suppose there is a planet that is tidally bound to its star, much like our moon is locked to the earth. If the conditions were right for the average temporature of the planet to sustain liquid water, then would all the acumilation of ice on the dark side cause the planet to change its rotation?

Answer 1

It is very possible. It depends on how volume there is on each side. An object only rotates the same way if its center of mass does not change. If a side of a planet suddenly becomes more dense(the water becomes liquid, the fact that it is water and not a normal fluid makes this even more difficult) then the center of mass may move toward that side. However since water flows it may level out around the whole thing, but then because it possibly refreezes it may throw it off again. I'm basically just giving you my train of thought...
Basically if the center of mass changes it may start to wobble(or rotate on an axis not at the center of the planet).
Say this happened on earth, the effect of this would be minimal because the earth minus the water is so massive that the center of mass wouldn't change much. If the planet has a large volume of water and a large volume actully changed(only water so deep would melt). Also the specific energy of water is relatively high which would make thie melting/freezing go slowly. There are so many things that make it seem that it would be a very small change if at all. A Very Large amount of energy would have to be given off by this sun for this to be possible...i think

Answer 2

A very interesting question. While I ponder it I'll look forward to veiwing the anwsers of physics whiz's far more versed in the subject than I.