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A block is kept on a rough surface and a...

A block is kept on a rough surface and applied with a horizontal force as shown which is gradually increasing for zero. The coefficient of static and kinetic friction are `1//sqrt3` then

A

When F is less then the limiting friction, angle made by net force on the block by the surfce is less then `30^(@)` with vertical.

B

When the block is just about to move, the angle made by net force by the surface on the block become equal to `30^(@)` with vertical.

C

When the block starts to accelerate, the angle made by net force by the surface on the block becomes constant and equal to `30^(@)` vertical.

D

The angle made by net force with vertical on the block by the surface, depends on the mass of the block.

Text Solution

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The correct Answer is:
A, B, C, D
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Knowledge Check

  • A block rests on a rough inclined plane making an angle of 30° with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10 N, the mass of the block ((in kg) is .......... (Take g = 10 m//s^(2) )

    A
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    B
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    C
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    D
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