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NEET UG PHYSICS MCQ: SYSTEM OF PARTICLES

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Application +4 | -1

Two bodies of mass 10 kg and 2 kg are moving with velocities

\left( {2\hat i - 7\hat j + 3\hat k} \right)\,m/s

and

\left( { - 10\hat i + 35\hat j - 3\hat k} \right)\,m/s

respectively. The velocity of their centre of mass is

View answer and explanation

Correct option: B

2\hat k{\mkern 1mu} m/s

Option B (

2\hat k{\mkern 1mu} m/s

) is correct because the velocity of the center of mass is calculated using the formula

v_{cm} = (m_1v_1 + m_2v_2) / (m_1 + m_2)

.

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