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If force vector is along X-axis and radi...

If force vector is along X-axis and radius vector is along Y-axis then the direction of torque is

A

`overset rarr r xx overset rarr F`

B

`overset rarr r.overset rarr F`

C

`|overset rarr r||overset rarr F|`

D

none of these

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SL ARORA-System of particles & rotational Motion-EXERCISE
  1. A ring of radius R is first rotated with an angular velocity omega and...

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  2. Which one is a vector quantity?

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  3. If force vector is along X-axis and radius vector is along Y-axis then...

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  4. Find the torque of a force vecF= -3hati+hatj+5hatk acting at the poin...

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  5. If force acts on a body, whose line of action does not pass through it...

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  6. Can the couple acting on a rigid body produce translatory motion ?

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  7. In order to balance a see-saw of total length 10.0m, two kids weighing...

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  8. a uniform beam, of length L and mass m = 1.8 kg, is at rest on two sca...

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  9. An automobile engine develops 100 kW when rotating at a speed of 1800 ...

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  10. Angular momentum is

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  11. Which is a vector quantity

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  12. Dimensions of angular momentum are

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  13. Joule-second is the unit of

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  14. Under a constant torque, the angular momentum of a body changes from A...

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  15. A particle of mass m is rotating in a plane in circular path of radius...

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  16. A stationary uniform rod of mass 'm', length 'l' leans against a smoo...

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  17. The torque vec tau on a body about a given point is found to be equal ...

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  18. If a particle of mass m is moving with constant velocity v parallel to...

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  19. Analogue of mass in rotational motion is.

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  20. Moment of inertia of body depends upon

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