NEET 2020 Physics Center of Mass MCQ Question
Two particles of mass 5 kg and 10 kg respectively are attached to the two ends of a rigid rod of length 1 m with negligible mass. The centre of mass of the system from the 5 kg particle is nearly at a distance of:
67 cm
80 cm
33 cm
50 cm
Correct Answer
Detailed Explanation
Taking the 5 kg particle at origin, the center of mass = (m₁×0 + m₂×1)/(m₁+m₂) = (10×1)/(5+10) = 10/15 = 2/3 m ≈ 67 cm from the 5 kg particle. The original explanation incorrectly calculated 33 cm (distance from the 10 kg particle). The correct answer is A.
Found an issue with this question?
Related Questions
More from 2020
Goblet cells of alimentary canal are modified from:
In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly dec...
Which of the following statements are true for the phylum-Chordata? (a) In Urochordata notochord extends from head to tail and it is present through...