Home
Class 12
PHYSICS
A block of mass m is placed on a rough h...

A block of mass m is placed on a rough horizontal surface. The coefficent of friction between them is `mu`. An external horizontal force is applied to the block and its magnitude is gradually increased. The force exerted by the block on the surface is R.

A

The magnitude of R gradually increase.

B

`R le mg sqrt(mu^(2)+1)`.

C

The angle made by R with the vertical will gradually increase.

D

The angle made by R with the vertical `le tan^(-1)mu`.

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • KINEMATICS, FORCES

    D MUKHERJEE|Exercise Type 2|22 Videos

  • KINEMATICS, FORCES

    D MUKHERJEE|Exercise Revision Exercise|26 Videos

  • IIT QUESTIONS 5

    D MUKHERJEE|Exercise Matrix matching type|2 Videos

  • MISCELLANEOUS QUESTION 1

    D MUKHERJEE|Exercise Miscellaneous Questions-1 (Straight-Objective Type)|54 Videos

Similar Questions

Explore conceptually related problems

A block of mass M is kept on as rough horizontal surface. The coefficient of static frictionbetween the block and the surface is mu . The block is to be pulled by applying a force to it. What minimum force is needed to slide the block? In which direction should this force act?

A block of mass M is using on a rough horizontal surface. mu_R is the coefficient of kinetic friction between the block and the surface. What is the net force exerted by the surface on the block?

Knowledge Check

  • A block of mass 10kg is placed on a rough horizontal surface having coefficient of friction mu=0.5 . If a horizontal force of 100N is acting on it, then acceleration of the will be.

    A
    `0.5m//s^(2)`
    B
    `5m//s^(2)`
    C
    `10m//s^(2)`
    D
    `15m//s^(2)`

  • A block of mass m is placed on a rough horizontal surface. If minimum force to pull the block is (mg)/(2) then coefficient of friction is :

    A
    `(1)/(2)`
    B
    `sqrt3`
    C
    `(1)/(sqrt3)`
    D
    None

  • A block of mass 5kg is lying on a rough horizontal surface. The coefficient of static and kinetic friction are 0.3 and 0.1 and 10m//s^(-2) . If a horizontal force of 50N is applied on the block, the frictional force is

    A
    25N
    B
    5N
    C
    10N
    D
    Zero

    • Similar Questions

    Explore conceptually related problems

    A block is kept on a rough horizontal surface as shown. Its mass is 2 kg and coefficient of friction between block and surface (mu)=0.5. A horizontal force F is acting on the block. When

    A force F accelerates a block of mass m on horizontal surface. The coefficient of friction between the contact surface is . The acceleration of m will be -

    A block of mass m=5kg is resting on a rough horizontal surface for which the coefficient of friction is 0.2 . When a force F=40N is applied, the acceleration of the block will be (g=10m//s^(2)) .

    A block of mass m is placed on a horizontal surface. The coefficient of frication between them is mu . The block has to be moved by applying a single external force on it. The force may be applied in my direciton. The minimum value of this force must be

    A block of mass 70 kg is kept on a rough horizontal surface and coefficient of static friction between block and surface is 0.4 . A man is trying to pull the block by applying a horizontal force .The net contact force exerted by the surface on the block is F , then:

    Home
    Profile