Home
Class 12
PHYSICS
The torque of the force vecF=(2hati-3hat...

The torque of the force `vecF=(2hati-3hatj+4hatk)N` acting at the point `vecr=(3hati+2hatj+3hatk)m` about the origin be

A

`-17 hati+6hatj+13hatk`

B

`-6hati+6hatj-12hatk`

C

`17hati-6hatj-13hatk`

D

`6hati+6hatj+12hatk`

Text Solution

Verified by Experts

The correct Answer is:
C
As, `tau=reeF`
`=(3hati+2hatj+3hatk)xx(2hati-3hatj+4hatk)=17hati-6hatj-13hatk`
Promotional Banner

Topper's Solved these Questions

  • ROTATIONAL MOTION'

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise PRACTICE EXERCISE (Exercise 2 (MISCELLANEOUS PROBLEMS))|47 Videos

  • ROTATIONAL MOTION'

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET Corner|35 Videos

  • ROTATIONAL MOTION'

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET Corner|35 Videos

  • REFRACTION OF LIGHT

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Exercise 2|25 Videos

  • SCALARS AND VECTORS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Exercise 2 (Miscellaneous Problems)|20 Videos

Similar Questions

Explore conceptually related problems

What is the torque of the force vecF=(2hati+3hatj+4hatk)N acting at the point vecr=(2hati+3hatj+4hatk)m about the origin? (Note: Tortue, vectau=vecrxxvecF )

Find the torque of a force vecF=2hati+hatj+4hatk acting at the point vecr=7hati+3hatj+hatk :

The torque of force F =(2hati-3hatj+4hatk) newton acting at the point r=(3hati+2hatj+3hatk) metre about origin is (in N-m)

Find the torque of a force vecF=3hati+2hatj+hatk acting at the point vecr=8hati+2hatj+3hatk about origin

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

The torpue of force vecF=-2hati+2hatj+3hatk acting on a point vecr=hati-2hatj+hatk about origin will be :

Find the torque (vectau=vecrxxvecF) of a force vecF=-3hati+hatj+3hatk acting at the point vecr=7hati+3hatj+hatk

A force vecF=4hati-5hatj+3hatk N is acting on a point vecr_1=2hati+4hatj+3hatk m. The torque acting about a point vecr_2=4hati-3hatk m is

Find the torque of a force vecF=3hati+4hatj+5hatk N about a point O , whose position vector is vecr = hati+hatj+hatk m .

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ROTATIONAL MOTION'-PRACTICE EXERCISE (Exercise 1 (TOPICAL PROBLEMS))
  1. A mass is whirled in a circular path with a constant angular velocity ...

    Text Solution

    |

  2. A spherical solid ball of 1 kg mass and radius 3 cm is rotating about ...

    Text Solution

    |

  3. The torque of the force vecF=(2hati-3hatj+4hatk)N acting at the point ...

    Text Solution

    |

  4. A thin rod of mass m and length 2L is made to rotate about an axis pas...

    Text Solution

    |

  5. The instantaneous angular position of a point on a rotating wheel is g...

    Text Solution

    |

  6. If r is the distance between the Earth and the Sun. Then, angular mome...

    Text Solution

    |

  7. A battet dancer spins with 2.8 rps with her arms out stretched. When t...

    Text Solution

    |

  8. If the earth suddenly charges its radius x times the present value, th...

    Text Solution

    |

  9. A thin uniform rod AB of mass m and length l is hinged at one end to t...

    Text Solution

    |

  10. A particle of mass m is projected with a velocity v making an angle of...

    Text Solution

    |

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

    Text Solution

    |

  12. What torque will increase angular velocity of a solid disc of mass 16k...

    Text Solution

    |

  13. A particle of mass m is projected with a velocity v making an angle of...

    Text Solution

    |

  14. Total kinetic energy of a rolling solid spher of mass m with velocity ...

    Text Solution

    |

  15. A force of 100 N is applied perpendicularly to the left edge of the re...

    Text Solution

    |

  16. The moment of inertia of the body about an axis is 1.2 kg m^(2). Initi...

    Text Solution

    |

  17. A particle performing uniform circular motion gas angular momentum L. ...

    Text Solution

    |

  18. An ice skater spins at 3pi" rad s"^(-1) with hers arms extended. If he...

    Text Solution

    |

  19. A wheel having moment of inertia 2 kg m^(2) about its vertical axis, r...

    Text Solution

    |

  20. A cord is wound round the circumference of wheel of radius r. The axis...

    Text Solution

    |