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A diver is able to cut through water in ...

A diver is able to cut through water in a swimming pool. Which property of matter does this observation show?

A

decreases his moment of inertia

B

decreases his angular velocity

C

increases his moment of inertia

D

decreases his linear velocity

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The correct Answer is:
A
On bending the head before diving in swimming pool, the moment of inertia of a person decreases.
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DC PANDEY ENGLISH-ROTATION-(A) Chapter Exercises
  1. A uniform disc of radius a and mass m, is rotating freely with angular...

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  2. A uniform square plate has a small piece Q of an irregular shape remov...

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  3. A diver is able to cut through water in a swimming pool. Which propert...

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  4. A body is in pure rotation. The linear speed 'v' of a particle, the di...

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  5. The rotational kinetic energy of a body is E and its moment of inertia...

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  6. A body is under the action of two equal and oppositely directed forces...

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  7. A particle performing uniform circular motion has angular momentum L. ...

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  8. Moment of a force of magnitude 10 N acting along positive y-direction ...

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  9. The radius of gyration of a uniform rod of length L about an axis pass...

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  10. Five particles of mass 2 kg are attached to the rim of a circular disc...

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  11. A particle is moving in a circular orbit with constant speed. Select w...

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  12. If the equation for the displacement of a particle moving on a circle ...

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  13. A wheel is a rest. Its angular velocity increases uniformly and become...

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  14. A rigid body rotates about a fixed axis with variable angular velocity...

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  15. A wheel is rotating at the rate of 33 "rev min"^(-1). If it comes to s...

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  16. A wheel is rotating at 900 rpm about its axis. When power is cut off i...

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  17. A wheel is subjected to uniform angular acceleration about its axis. I...

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  18. The motor of an engine is rotating about its axis with an angular velo...

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  19. Let vecF be a force acting on a particle having positon vector vecr. L...

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  20. A particle of mass 5 g is moving with a uniform speed of 3 sqrt(2) "cm...

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