Saved Bookmarks
| 1. |
The centre of gravity of a body on the earth coincides with its centre of mass for a ‘small’ object whereas for an ‘extended’ object it may not. What is the qualitative meaning of ‘small and ‘extended’ in this regard?For which of the following the two coincides? A building, a pond, a lake, a mountain? |
|
Answer» Centre of gravity is centre of it’s geometry or given structure but centre of mass is a point where whole mass of the body can be considered. When vertical height or geometric centre of object is very small and very near to earth’s surface comparison to earth’s radius. So, these objects are small, if it is larger, they are extended objects. (a) Buildings (High) and ponds are small objects. (b) Mountains and lakes are extended objects. |
|