JEE Main 2004 Physics question
A block rests on a rough inclined plane making an angle of 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 )
Answer: (1)
Solution
The block is at rest, so the static friction equals the component of weight down the incline (it is not necessarily the limiting value): kg, option (1).
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