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A force vec(F)=4hati-5hatj+3hatk is acti...

A force `vec(F)=4hati-5hatj+3hatk` is acting a point `vec(r_(1))=hati+2hatj+3hatk`. The torque acting about a point `vec(r_(2))=3hati-2hatj-3hatk` is

A

zero

B

`42 hati - 30 hatj + 6hatk`

C

`42 hati + 30hatj + 6hatk`

D

`42hati + 30hatj - 6hatk`

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TARGET PUBLICATION-LAWS OF MOTION-EXERCISE
  1. Let F be the force acting on a particle having position vector vec( r ...

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  2. A force of -F hatk acts on O, the origin of the coordinate system. The...

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  3. A force vec(F)=4hati-5hatj+3hatk is acting a point vec(r(1))=hati+2hat...

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  4. A couple produces

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  6. A uniform bar RS weighs 100 g and is 80 cm long. From the end R, two m...

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  7. The centre of mass of a body

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  8. Where will be the centre of mass on combining two masses m and M(M gt ...

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  9. The centre of mass of a system of two particles divides the distance b...

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  10. A body A of mass M while falling vertically downwards under gravity br...

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  11. Four bodies of equal mass start moving with same speed as shown in the...

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  12. Two bodies of mass 1 kg and 3 kg have position vectors hati+2hatj+hatk...

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  13. Centre of mass of 3 particles 10 kg, 20 kg and 30 kg is at (0, 0, 0). ...

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