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A block rests on a rough inclined plane ...

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

A

`2.0`

B

`4.0`

C

`1.6`

D

`2.5`

Text Solution

Verified by Experts

The correct Answer is:
A
`mg sin 30^(@) = 10`
`m = 2 kg`
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