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Find the torque of a force vecF= -3hati+...

Find the torque of a force `vecF= -3hati+hatj+5hatk ` acting at the point `vecr=7hati+3hatj+hatk`

A

`14 hati-38hatj+16hatk`

B

`4 hati +4hatj+6hatk`

C

`-14hati+38hatj-16hatk`

D

`21hati+3hatj+5hatk`

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SL ARORA-System of particles & rotational Motion-EXERCISE
  1. Which one is a vector quantity?

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

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

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

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

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

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

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

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  9. Angular momentum is

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  10. Which is a vector quantity

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  11. Dimensions of angular momentum are

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  12. Joule-second is the unit of

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

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

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

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

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

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  18. Analogue of mass in rotational motion is.

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  19. Moment of inertia of body depends upon

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  20. Moment of inertia of a body does not depend on

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