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An iron block of sides 50cm xx 8cm xx 15...

An iron block of sides `50cm xx 8cm xx 15cm` has to be pushed along the floor. The force required will be minimum when the surface in contact with ground is

A

`8"cm"xx15"cm surface"`

B

`50"cm"xx15"cm surface"`

C

`8"cm"xx50"cm surface"`

D

force is same for all surface

Text Solution

Verified by Experts

The correct Answer is:
D
Force will be same for all the surfaces.
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Knowledge Check

  • A block of steel of size 5 cm xx 5 cm xx 5 cm is weighed in water. If the relative density of steel is

    A
    `6 xx 5 xx 5 xx 5 g `
    B
    ` 4 xx 4 xx 4 xx 7 g `
    C
    ` 5 xx 5 xx 5 xx 7 g `
    D
    ` 4 xx 4 xx 4 xx 6 g `

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    A
    `6 xx 5 xx 5 xx 5 gf`
    B
    `4 xx 4 xx 4 xx 7 gf`
    C
    `5 xx 5 xx 5 xx 7 gf`
    D
    `4 xx4xx 4 xx 6 gf`

  • In the given figure from a cuboidal solid metallic block of dimensions 15 cm xx 10 cm xx 5 cm a cylindrical hole of diamter 7 cm is drilled out . Find the suface area of the remaining block .

    A
    `450 cm^2 `
    B
    `553 cm^2 `
    C
    `550 cm^2 `
    D
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