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A horizontal force of 10 N is necessary ...

A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. What is the weight of the block (in N)?

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Knowledge Check

  • A block of mass 0.1 kg is kept pressed against a wall by applying a force of 5 N horizontally on the block. Coefficient of friction between the block and the wall is 0.5. Friction acting on the block is.

    A
    2.5 N
    B
    0.98 N
    C
    4.9 N
    D
    0.40 N

  • A block of mass m_(2) is placed on a horizontal table and another block of mass m_(1) is placed on top of it. An increasing horizontal force F = at is exerted on the upper block but the lower block never moves as a result. If the co-efficient of friction between the blocks is mu_(1) and that between the lower block and the table is mu_(2) , then what is the maximum possible value of mu_(1)//mu_(2) ?

    A
    `m_(2)/(m_(1))`
    B
    `1+(m_(2))/(m_(1))`
    C
    `(m_(1))/(m_(2))`
    D
    `1+(m_(1))/(m_(2))`

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