Physics
Anu and Amy purchased ice creams in plastic balls and cones, respectively, during their outing at the science fair. After consuming their ice creams, Anu stated that regardless of whether they were filled with ice cream or empty, the centre of gravity of the objects would remain unchanged. Do you agree with Anu? Why?
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Answer
No, I do not agree with Anu.
The centre of gravity of the sphere remains the same, while the centre of gravity of hollow cones and solid cones are different. The center of gravity of an object is the average position of its weight. It’s not solely determined by shape, but by how mass is distributed in that shape.
| Object | Position of center of gravity |
|---|---|
| Solid or hollow sphere | Geometric center of the sphere |
| Solid cone | At a height h/4 from the base on its axis (if height of cone = h) |
| Hollow cone | At a height h/3 from the base on its axis (if height of cone = h) |
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