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Most Important Selected Qs for JEE AdvancedPhysicsCenter of Mass, Momentum and Collision

Choose the correct statement about centre of mass.

Options

  1. AFor calculation of any quantity associated with extended body we can assume total mass of body to be concentra
  2. BCentre of mass of a body moves in the same way as if all external forces are acting on it and total mass of bo
  3. CTorque of centrifugal force about centre of mass on rigid body undergoing rotational motion is always zero.
  4. DAll above

Correct answer

B. Centre of mass of a body moves in the same way as if all external forces are acting on it and total mass of bo

Step-by-step solution

We can not assume total mass to be concentrated at centre of mass for calculation of all the thing e.g. for calculation of moment of inertia, calculation of torque of centrifugal force on a rod about hinge as shown.

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