Q 11-06-249NEETNEET 2022Top questionEasy
Two objects of mass $10$ kg and $20$ kg respectively are connected to the two ends of a rigid rod of length $10$ m with negligible mass. The distance of the center of mass of the system from the $10$ kg mass is
Answer: (C) $\dfrac{20}{3}$ m
Take the $10$ kg mass at $x = 0$ and the $20$ kg mass at $x = 10$ m.
$$x_{cm} = \frac{10 \times 0 + 20 \times 10}{10 + 20} = \frac{200}{30} = \frac{20}{3}\ \text{m}$$
Solution by Sreeraj P, M.Sc Physics