Q. 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 centre of mass of the system from the 10 kg mass is :
A) 5m
B) $\frac{10}{3}$ m
C) $\frac{20}{3}$ m
D) 10 m
Explanation
[Solution] $x_{cm} = \frac{20 \times 10}{10 + 20} = \frac{20}{3}$ m from the 10 kg mass. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.