NEET Physics Centre of Mass MCQ Question
In the diagram shown above, if the masses m1 and m2 collide elastically and have velocities v1f and v2f respectively after collision, which of the following expressions correctly represents the velocity of the center of mass of the system post-collision?
(m1 * v1f + m2 * v2f) / (m1 + m2)
(m1 * v1i + m2 * v2i) / (m1 + m2)
v1f + v2f
(m1 + m2) * (v1f + v2f)
Correct Answer
Detailed Explanation
The velocity of the center of mass after a collision in an isolated system is given by the total momentum divided by the total mass, which is (m1 * v1f + m2 * v2f) / (m1 + m2).
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