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Find value of pulling force F for which ...

Find value of pulling force F for which block just moves. Given coefficient of friction for surface is `mu`.

Text Solution

Verified by Experts

The correct Answer is:
`F=(mug)/(costheta+musintheta)
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Knowledge Check

  • 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 cubical block of side L rests on a rough horizontal surface with coefficient of friction mu . A horizontal force F is applied on the block as shown. If the coefficient of frictions sufficienty high so that the block does not slide before toppling, the minimum force required to topple the block is : .

    A
    infinitesimal
    B
    `mg//4`
    C
    `mg//2`
    D
    `mg (1- mu)`

  • A homogenous block of mass m, width b and height h is resting on a rough horizontal surface A horizontal force F is applied to it , which makes it to move with a constant velocity . The coefficient of friction between block and surface is mu Find the greatest height at which force F may be applied to slide the block with out tipping over

    A
    `(b)/(2 mu)`
    B
    `(2b)/(mu)`
    C
    `(b)/(mu)`
    D
    `(2 sqrt(2b))/(mu)`

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