Home
Class 11
PHYSICS
A rod of mass m is supported by string ...

A rod of mass `m` is supported by string `AB` and friction due to wall. Then friction force on rod due to wall is `:`
`(g=` acceleration due to gravity `)`

A

`mg` upward

B

`mg`downward

C

`(mg)/(2)` upward

D

Data insuffient

Text Solution

Verified by Experts

The correct Answer is:
C

Torque about `A`
`mg.(l)/(2)-fl=0`
`F=(mg)/(2)`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • DAILY PRACTICE PROBLEMS

    RESONANCE|Exercise dpp 79|4 Videos

  • DAILY PRACTICE PROBLEMS

    RESONANCE|Exercise dpp 80|4 Videos

  • DAILY PRACTICE PROBLEMS

    RESONANCE|Exercise DPP 77|8 Videos

  • CURRENT ELECTRICITY

    RESONANCE|Exercise Exercise|54 Videos

  • ELASTICITY AND VISCOCITY

    RESONANCE|Exercise Advanced Level Problems|9 Videos

Similar Questions

Explore conceptually related problems

The acceleration due to gravity

Define acceleration due to gravity .

Knowledge Check

  • The value of acceleration due to gravity

    A
    is same on equator and poles
    B
    is least on poles
    C
    is least on equator
    D
    increase from pole to equator

  • The value of acceleration due to gravity

    A
    Is same at the equator and poles
    B
    Is least at the poles
    C
    Is least at the equator
    D
    Is maximum at the centre of the earth

  • Acceleration due to gravity is minimum at

    A
    The surface of earth
    B
    The depth 100 km from the earth`s surface
    C
    The centre of earth
    D
    The height 100 km from the earth`s surface

    • Similar Questions

    Explore conceptually related problems

    What are acceleration due to gravity

    Acceleration due to gravity of earth

    Define acceleration due to gravity.

    What is the acceleration due to gravity?

    Acceleration due to gravity is maximum at

    Home
    Profile