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It torque is zero, then...

It torque is zero, then

A

angular momentum is conserved

B

linear momentum is conserved

C

energy is conserved

D

angular momentum is not conserved

Text Solution

Verified by Experts

The correct Answer is:
A
Torque, `tau=(dL)/(dt)`
where, L = angular momentum
If `tau =0`
then `(dL)/(dt)=0`
i.e., L = constant.
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DC PANDEY-ROTATION-Check point 9.2
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  4. The torque of a force F = -2 hat(i) +2 hat(j) +3 hat(k) acting on a po...

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  5. A door 1.6 m wide requires a force of 1 N to be applied at the free an...

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  8. A disc is rotating with angular velocity omega. A force F acts at a po...

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  9. Angular momentum is

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  10. The unit mass having r = 8 hat(i) - 4 hat(j) and v = 8 hat(i) + 4 hat(...

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  11. If the earth is a point mass of 6 xx 10^(24) kg revolving around the s...

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  12. A particle with the position vector r has linear momentum p. Which of ...

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  13. By keeping moment of inertia of a body constant, if we double the time...

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  14. It torque is zero, then

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  15. Total angular momentum of a rotating body remains constant, if the net...

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  16. The angular momentum of a rotating body changes from A(0) to 4 A(0) in...

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  17. If the radius of earth contracts 1/n of its present day value, the len...

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  18. A thin circular ring of mass M and radius R is rotating about its axis...

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  19. A disc of mass 2 kg and radius 0.2 m is rotating with angular velocity...

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