A mass of 4 kg rests on a horizontal plane. The plane is gradually inclined until at an angle 0 = 15^(@) with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface

A mass of 4 kg rests on a horizontal plane. The plane is gradually inc

1.	A mass of 4 kg rests on a horizontal plane. The plane is gradually inclined until at an angle 0 = 15^(@) with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface
Answer» SOLUTION : Forceactingon blockand theircomponentare shown in figure When `theta `increasestan `theta`will alsoincreasehencemagnitudeof `f_(s) ` will increaseuptocertainlimitLetfor `theta = theta_(max)` frictionalforcebecomemaximum`f_(s) _(max)` fromequatin(3) `tan theta _(max)` `tan 15^(@) =mu_(s)` `mu_(s)= tan15^(@)= 0.2679` `mu_(s)= 0.27`