Physics - Center of Mass Question with Solution | TestHub
The centre of mass of given system is at a distance x from geometrical centre of bigger body.
List - I | List - II |
|---|---|
(A) | (P) |
(B) | (Q) Centre of mass lies outside the bigger body |
(C) | (R) |
(D) (Disk with one attached circular mass) | (S) Centre of mass lies within bigger body |
| (T) None of these |
Options:
Answer:
Solution:
A: Treat the circular cavity as negative mass. The COM shifts away from it but stays inside, so 0 < x < R:
B: Treat the two circular cavities as negative masses. The resultant COM stays inside, so 0 < x < R
C: Treat the square cavity as negative mass. The COM shifts opposite the removed part but stays inside: R
D: Treat the attached circular body as positive mass. The COM shifts toward it but remains within the bigger body:
Therefore the matching code is option A.
Final mapping: A -> R,S; B -> R,S; C -> R,S; D -> R,S. Option A.
