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Standard XII

Physics

Newton's Laws for System of Particles

Two particles...

Question

Two particles of mass $M$ and $2 M$ are at a distance $D$ apart. Under their mutual force of attraction they start moving towards each other. The acceleration of their centre of mass when they are $D / 2$ apart is:

2 G M / D^{2}

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4 G M / D^{2}

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8 G M / D^{2}

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Zero

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Solution

The correct option is D Zero
The acceleration of center of mass is zero.

Since, the motion is due to mutual attraction the center of mass will not change.

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Two particles of mass M and 2M are at a distance D apart. Under their mutual force of attraction they start moving towards each other. The acceleration of their centre of mass when they are D/2 apart is:

The correct option is D ZeroThe acceleration of center of mass is zero.Since, the motion is due to mutual attraction the center of mass will not change.

Two particles of mass $M$ and $2 M$ are at a distance $D$ apart. Under their mutual force of attraction they start moving towards each other. The acceleration of their centre of mass when they are $D / 2$ apart is:

The correct option is D Zero
The acceleration of center of mass is zero.

Since, the motion is due to mutual attraction the center of mass will not change.