Draw a neat labelled diagram to represent the angle of repose.

Explanation

The angle between the inclined surface and horizontal surface for which a body kept on the inclined surface just begins to slide is known as angle of repose.
`R=mg cos theta`
`F=mg sin theta`
`mu=(F_(t))/(R )=(mg sin theta)/(mg cos theta)`
`:.mu=tan theta` where `'theta'` is the angle of repose.