A man of mass 80 kg pushes a box of mass 20 kg horizontally. The man moves the box with a constant acceleration of `2 m//s^2` but his foot does not slip on the groung. There is no fricion between the box and t ground, whereas there is sufficent friction between the man's foot and ground to prevent him from slipping
Statement I : Angle of repose is equal to angle of limiting friction
When the body is just at the point of motion, the force of friction in this stage is called as limiting friction.

Answer

B

Explanation

`F = mg sin alpha and R = mg cos alpha" " :. F/R = tan alpha = mu, "Hence" alpha = theta`
`"Angle of repose"="angle of limiting friction"`