For which one of the following does the centre of mass lie outside the body?
A fountain pen
A cricket ball
A ring
A book
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CDS-1 – 2017
The center of mass of an object is a point where the weighted average of the positions of all parts of the object is located. While for uniform solid objects with simple geometry (like a sphere or cube), the center of mass is often at the geometric center and inside the object, for objects with holes or non-uniform density, the center of mass can lie outside the physical boundaries of the object. A ring is a hollow circular structure. Its mass is distributed along the circumference, but the geometric center (and thus the center of mass for a uniform ring) is in the empty space at the center of the circle.