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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 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 is `" "(g=10 ms ^(-2))`

A

1kg

B

2kg

C

3kg

D

4kg

Text Solution

Verified by Experts

The correct Answer is:
B
`f=mgsintheta`
`m=f/(gsintheta)=10/(10xx1/2)=2kg`
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