A box is lying on an inclined plane what is the coefficient of static friction if the box starts sliding when an angle of inclination is $60^o $

  • A

    $1.173$

  • B

    $1.732$

  • C

    $2.732$

  • D

    $1.677$

Similar Questions

A block pressed against the vertical wall is in equilibrium. The minimum coefficient of  friction is:-

Which one of the following statements is incorrect? 

  • [NEET 2018]

A block of mass $m$ is on an inclined plane of angle $\theta$. The coefficient of friction between the block and the plane is $\mu$ and $\tan \theta>\mu$. The block is held stationary by applying a force $\mathrm{P}$ parallel to the plane. The direction of force pointing up the plane is taken to be positive. As $\mathrm{P}$ is varied from $\mathrm{P}_1=$ $m g(\sin \theta-\mu \cos \theta)$ to $P_2=m g(\sin \theta+\mu \cos \theta)$, the frictional force $f$ versus $P$ graph will look like

  • [IIT 2010]

A uniform rod of length $L$ and mass $M$ has been placed on a rough horizontal surface. The horizontal force $F$ applied on the rod is such that the rod is just in the state of rest. If the coefficient of friction varies according to the relation $\mu = Kx$ where $K$ is a $+$ ve constant. Then the tension at mid point of rod is

A board is balanced on a rough horizontal semicircular log. Equilibrium is obtained with the help of addition of a weight to one of the ends of the board when the board makes an angle $\theta$ with the horizontal. Coefficient of friction between the log and the board is