Centre of Mass 1 Question 13

13. Two particles of mass $1 kg$ and $3 kg$ move towards each other under their mutual force of attraction. No other force acts on them. When the relative velocity of approach of the two particles is $2 m / s$, their centre of mass has a velocity of $0.5 m / s$. When the relative velocity of approach becomes $3 m / s$, the velocity of the centre of mass is $0.75 m / s$.

$(1989,2 M)$

Analytical & Descriptive Questions

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Answer:

Correct Answer: 13. $F$

Solution:

  1. Since, net force on the system is zero. Velocity of centre of mass will remain constant.


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