Question

Why is tapered water glass with a narrow base easier to tip over than glass with straight sides? Does it matter whether the glass full or empty

Answer 1

Explanation:

The tapered water glass has a smaller base, so when force is applied, and it turns, it's centre of mass may shift outside the base relatively easily as compared to a straight glass. So it's easier to tip over. And it does matter weather there is water in it or not, the higher the centre of mass of the glass, the easier it is to tip, so when you fill it with water, it's centre of mass shifts up. But it's mass also increases, so you need to apply a greater amount to force to tip it over.