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Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

हिन्दी

An ideal rigid body is best defined as a body in which:

  1. The shape changes continuously when external forces act on it.
  2. The distances between all pairs of particles do not change under any circumstances.
  3. The particles are always moving relative to one another with constant speed.
  4. The centre of mass always remains strictly at rest.

Correct answer · Option 2

The distances between all pairs of particles do not change under any circumstances.

Explanation

By definition, a rigid body is ideally a body with a perfectly definite and unchanging shape, such that the distances between all pairs of particles of the body do not change.

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