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Standard XII

Physics

Center of Mass as an Average Point

Two particles...

Question

Two particles of masses $m_{1}$ and $m_{2} (m_{1} > m_{2})$ , initially at rest, move towards each other under an inverse square law force of attraction. Pick out the correct statement about the centre of mass (CM) ofthe system

The CM moves towards

m_{1}

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The CM moves towards

m_{2}

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The CM remains at rest

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The motion of CM is accelerated

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Solution

The correct option is A The CM remains at rest
When no external force acts on the system and initially velocity of centre of mass is zero and so the centre mass remain at rest.

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Two particles of masses m1 and m2(m1>m2), initially at rest, move towards each other under an inverse square law force of attraction. Pick out the correct statement about the centre of mass (CM) ofthe system

The correct option is A The CM remains at restWhen no external force acts on the system and initially velocity of centre of mass is zero and so the centre mass remain at rest.

Two particles of masses $m_{1}$ and $m_{2} (m_{1} > m_{2})$ , initially at rest, move towards each other under an inverse square law force of attraction. Pick out the correct statement about the centre of mass (CM) ofthe system

The correct option is A The CM remains at rest
When no external force acts on the system and initially velocity of centre of mass is zero and so the centre mass remain at rest.