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[Rotational dynamics] cube sliding on a dish
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[QUOTE="Nathanael, post: 5453577, member: 509990"] It's also incompatible with eq. 3), because K[SUB]i[/SUB]=K[SUB]f[/SUB] ⇒ ΔK=0 ⇒ Work[SUB]net[/SUB]=0 which of course is not the case. That's a good point; I just assumed friction was with the ground of the dish, but if it was instead with the wall of the dish then the frictional magnitude will vary in time. That would make the problem a bit more interesting... In that case, we should be able to solve for the frictional coefficient. (But of course we would have to know that friction is purely with the wall. If it is some combination of with the wall and with the ground then we can't solve for anything.) Did the book's solution treat the friction as being with the wall? Anyway I'm not sure what you mean by "depend on the path of the cube." [/QUOTE]
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[Rotational dynamics] cube sliding on a dish
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