Find `theta` at which slipping will start. `mu_(s)` is coefficient of static friction. (Angle of repose)

Angle of friction and angle of repose are

Friction: Static & Kinetic, Angle of repose.

What is the relation between coefficient of friction and angle of repose ?

A worker wishes to pile up sand on to a circular area of radius R . No sand is to spill on to the surrounding area. If mu_(s) is the coefficient of static friction sand particles, then choose the correct statement (s)

Angle of Friction and Repose

Assertion : Static friction is a self-adjusting force upto its limit mu_(s)N "where" mu_(s) is the coefficient of static friction. Reason: One can use the equation f_(s)=mu_(s)N only when the maximum value of static friction comes into play

Angle OF Friction and Angle OF Repose

A car starts from rest at time t = 0 and it a-t graph is shown in figure. A coin is initially at rest on the floor of the car. At t = 1 s the coin begins to slip and it stops slipping at t = 3 s. The coefficient of static friction between the floor and the coin is (g = 10 m/ s^2 )

Explain the terms (i) angle of friction (ii) coefficient of friction and (iii) angle of repose Establish a relation between them .