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Mas of man is 'm' There is no friction ...

Mas of man is 'm' There is no friction between man and black But `'mu'` is coefficient of friction between block and floor.

Maximum force that the man can exert on the rope so that the block does not slip on floor

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Knowledge Check

  • A cubical block of mass 'm' rests on rough horizontal surface. mu is coefficient of static friction between block and the surface. A force "mg" acting on cube at an angle " theta " with vertical side of cube pulls the block. if the block is to be pulled along the surface then the value of cot (theta //2) is

    A
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    B
    greater than `mu`
    C
    equal to `mu`
    D
    not dependent on `mu `

  • A cubical block of mass 'm' rests on rough horizontal surface. mu is coefficient of static friction between block and the surface. A force "mg" acting on cube at an angle " theta " with vertical side of cube pulls the block. If the block is to be pulled along the surface then the value of cot (theta//2) is

    A
    less than `mu`
    B
    greater than `mu`
    C
    equal to `mu`
    D
    not dependent on `mu`

  • A cubical block of mass 'm' rests on rough horizontal surface. mu is coefficient of static friction between block and the surface. A force "mg" acting on cube at an angle "theta" with vertical side of cube pulls the block, if the block is to be pulled along the surface then the value of cot (theta//2) is

    A
    less then `mu`
    B
    greater than `mu`
    C
    equal to `mu`
    D
    not dependent on `mu`

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    A block of mass 'm' is resting on the floor of a lift. The coefficient of friction between the block and the floor is mu . When the lift is falling freely, the limiting frictional force between block and surface is

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