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NEET UG PHYSICS MCQ: SYSTEM OF PARTICLES

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Application +4 | -1

A 2 kg body and a 3 kg body are moving along the x-axis. At a particular instant the 2 kg body has a velocity of

3\;m{s^{ - 1}}

and the 3 kg body has the velocity of

2m{s^{ - 1}}

. The velocity of the centre of mass at that instant is

View answer and explanation

Correct option: D

None of these

Option D (None of these) is correct because the velocity of the center of mass is calculated as

v_{cm} = (m_1v_1 + m_2v_2) / (m_1 + m_2) = (2*3 + 3*2) / (2+3) = 12/5 = 2.4 m/s

, which is not any of the given options.

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