Home
Class 11
PHYSICS
Statement -1: Torque due to force is max...

Statement -1: Torque due to force is maximum when angle between `vec r and vecF is 90^(@)`.
Statement -2: The unit of torque is newton- meter.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
B
`tau=rFsintheta`. If `theta=90^(@)` then `tau_(max)=rF`
Unit of torque is N-m.
Promotional Banner

Topper's Solved these Questions

  • ROTATIONAL MOTION

    ERRORLESS|Exercise NCERT BASED QUESTIONS (Torque and Couple)|27 Videos

  • NEWTON'S LAWS OF MOTION

    ERRORLESS|Exercise ASSERTION & REASON |18 Videos

  • SIMPLE HARMONIC MOTION

    ERRORLESS|Exercise Assertion & Reason|15 Videos

Similar Questions

Explore conceptually related problems

Statement-1:If , |vec A+vec B| =|vecA-vecB| then angle between vecA and vecB is 90^(@) Statement-2 :vecA+vecB=vecB+vecA

Torque acting on a dipole placed in electric field is minimum when angle between vecp and vec(E) is:

Statement 1: The net force on a closed circular current carrying loop placed in a uniform magnetic field is zero. Statement 2: The torque produced in a conducting circular ring is zero when it is placed in a uniform magnetic field such that the magnetic field is perpendicular to the plane of loop.

Statement-1. Force between two charges is quadupled when distance between them is halved Statement-2. F = (1)/(r^(2)) , as per coulomb's law.

The ratio of torque acting on a magnet of magnetic moment M' placed in uniform magnetic field when angle between vecM and vecB" are "90^(@) and 0^(@) respectively is magnetic field, it experiences

If vec a and vec b are unit Vectors,then what is the angle between vec a and vec b so that sqrt(2)vec a-vec b is a unit vector?

Statement -1: It is harder to open and shut the door if we apply force near the hinge Statement -2: Torque is maximum at hinge of the door.

Statement-1 : The expression n!(100 - n)! is maximum when n = 50 . Statement-2 : .^(2n)C_(r) is maximum when r = n .

In which of the following case of work done by a force will be maximum : when the angle between the direction of force and direction of motion is 0^(@) or 90^(@) ?

Statement I: The force of gravitation between a sphere and a rod of mass M_(2) is =(GM_(1)M_(2))//r . Statement II: Newton's law of gravitation holds correct for point masses.

ERRORLESS-ROTATIONAL MOTION-Assertion & Reason
  1. Statement-1 : The centre of mass of a proton and an electron, released...

    Text Solution

    |

  2. Statement-1 : The position of centre of mass of a body does not depend...

    Text Solution

    |

  3. Assertion : A shell at rest, explodes. The centre of mass of fragments...

    Text Solution

    |

  4. Assertion: A judo fighter in order to throw his opponent onto the matt...

    Text Solution

    |

  5. Assertion: The centre mass of an electron and proton, when released mo...

    Text Solution

    |

  6. Assertion : At the centre of earth, a body has centre of mass , but no...

    Text Solution

    |

  7. Assertion: When a body dropped from a height explodes in mid air, its ...

    Text Solution

    |

  8. Statement -1: It is harder to open and shut the door if we apply force...

    Text Solution

    |

  9. Statement-1 : Moment of inertia of a particle is same, whatever be the...

    Text Solution

    |

  10. Assertion : Inertia and moment of inertia are same quantities. Reaso...

    Text Solution

    |

  11. If earth shrink (without change in mass) to half it's present size. Le...

    Text Solution

    |

  12. Statement -1: Torque due to force is maximum when angle between vec r ...

    Text Solution

    |

  13. Statement-1 : Radius of gyration of a body is a constant quantity. ...

    Text Solution

    |

  14. Assertion: A ladder is more apt to slip, when you are high up on it th...

    Text Solution

    |

  15. Statement -1 : Torque is equal to rate of change of angular momentum ....

    Text Solution

    |

  16. Assertion : The speed of a whirl wind in a tornado is alarmigly high. ...

    Text Solution

    |

  17. Assertion : The velocity of a body at the bottom of an inclined plane ...

    Text Solution

    |

  18. Assertion : In rolling, all points of a rigid body have the same linea...

    Text Solution

    |

  19. Assertion : A wheel moving down a perfectly frictionless inclined plan...

    Text Solution

    |

  20. Assertion : The total kinetic energy of a rolling solid sphere is the ...

    Text Solution

    |