Question 246: Centre of Mass and Rotational Motion

Question

Two identical particles move towards each other with velocity $2v$ and $v$ respectively. The velocity of center of mass is

Accepted Answer

The velocity of center of mass of two particle system is
${v_c} = {{{m_1}{v_1} + {m_2}{v_2}} \over {{m_1} + {m_2}}}$
$ = {{m\left( {2v} \right) + m\left( { - v} \right)} \over {m + m}}$
$= {v \over 2}$

Answer

$v$

Answer

$v/3$

Answer

$v/2$

Answer

zero

Centre of Mass and Rotational Motion

Two identical particles move towards each other with velocity 2v and v respectively. The velocity of center of mass is

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