A body of mass M is kept on a rough horizontal surface (friction coefficient $\mu $). A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the surface on the body is $F$, where
$F = Mg$
$F = \mu Mgf$
$Mg \le F \le Mg\sqrt {1 + {\mu ^2}} $
$Mg \ge F \ge Mg\sqrt {1 + {\mu ^2}} $
The limiting friction between two bodies in contact is independent of
A uniform chain of length $L$ which hanges partially from a table, is kept in equilibrium by friction. The maximum length that can withstand without slipping is $l$ , then coefficient of friction between the table and the chain is
A force of $98\, N$ is required to just start moving a body of mass $100\, kg$ over ice. The coefficient of static friction is
Which one of the following statements is incorrect?
The coefficient of friction $\mu $ and the angle of friction $\lambda $ are related as