Why is a glass that is filled with liquid less stable than an empty glass?
I think this can be explained by the "lesser base area" theory. Can anyone help me elaborate or correct me if I'm wrong? Or do I explain in terms of te centre of gravity theory??
centre of gravity is higher on a glass filled with water. When the wind blows, the glass only needs to tilt a little and the whole structure will fall. Think of it like stacking uno stacko.
i though is the glass filled with liquid more stable? sincer it is heavier,the cg will be lower?
Originally posted by 4794:i though is the glass filled with liquid more stable? sincer it is heavier,the cg will be lower?
oh ya. Depends on what the glass is made of on the base and the sides.
TS, where did you see this question?
Originally posted by 4794:i though is the glass filled with liquid more stable? sincer it is heavier,the cg will be lower?
I'm thinking about this too
Originally posted by eagle:TS, where did you see this question?
O, that's extracted from my workbook. Eh, I find this question a little strange too. But I suppose it's got to do with the CG being a little higher. Yea, that's what i think.
does it have a drawing of the glass? Slanted or straight sides?
It also depend on what external factor that cause the glass container to be unstable.
Example: Using a detonator charge in an empty glass container.
Of course the forces will be dissipate and there won't be a significant shocked wave produce.
HOWEVER if the glass container is filled with water, things will be different.
Quote: Wiki
Initial damage to a target will be caused by the first shockwave; this
damage will be amplified by the subsequent physical movement of water
and by the repeated secondary shockwaves or bubble pulse.
assuming glass is symmetrical, cg will be at the base of glass when empty. when water is added, cg will rise in height, making it easier to topple.
however, when water is added, the weight is increased and more force will be needed to topple the glass.
Originally posted by weewee:assuming glass is symmetrical, cg will be at the base of glass when empty. when water is added, cg will rise in height, making it easier to topple.
however, when water is added, the weight is increased and more force will be needed to topple the glass.
sentence in red is not true.
the sentences in blue contradict each other.
Originally posted by eagle:sentence in red is not true.
the sentences in blue contradict each other.
oh ya you are right.
CG can be at a point which is not touching the glass....\*/
When a bit of water is actually added, the CG will be lowered and thus stabilised the glass.
When a lot of water is added in (water level mark way above original CG), the CG will be heightened and destabilised the glass.