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A rectangular wooden block 5xxcm10cmxx10...

A rectangular wooden block `5xxcm10cmxx10cm` in size is kept on a horizontal surface with its face of largeest area on the surface. A minimum force of `1.5N` applied parallel to the surface. Sets the block in sliding motion along the surface. If the block is now kept with its face of smaller area in contant with the surface, the minimum force applied parallel to the surface, to set the block in motion, is.

A

greater than `1.5N`

B

less than `1.5N`

C

equal `1.5N`

D

may be greater of less than `1.5N`

Text Solution

Verified by Experts

The correct Answer is:
C
force of friction is independent of the area of contact.
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Knowledge Check

  • A rectangular wooden block 5 cm xx 10 cm xx 10 cm in size is kept on a horizontal surface with its face of largest area on the surface. A minimum force of 1.5 N applied parallel to the surface sets the block in sliding motion along the surface. If the block is now kept with its face of smaller area in contact with the surface, the minimum force applied parallel to the surface, to set the block in motion, is

    A
    greater than 1.5 N
    B
    less than 1.5 N
    C
    equal to 1.5 N
    D
    may be greater or less than 1.5 N

  • A rectangular wooden box 10 cm xx 20cm xx 40 cm is size is kept on a horizontal surface with its of lergest are on the surface .A minimum force of 10 N applied are on the surface sets the box in sliding motion along the surface If the surface, minimum force applied parallel to the surface , to set the box in motion , is

    A
    less than `10 N`
    B
    May be greater or less than `10 N`
    C
    greater than `10 N`
    D
    equal to `10 N`

  • A block of mass 4 kg is kept on a rough horizontal surface. The coefficient of static friction is 0.8. If a force of 19 N is applied on the block parallel to the floor, then the force of friction between the block and floor is

    A
    32 N
    B
    18 N
    C
    19 N
    D
    9.8 N
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