A block is kept on a rough surface and applied with a horizontal force as shown which is gradually increasing for zero. The coefficient of static and kinetic friction are `1//sqrt3` then

Options

A. When F is less then the limiting friction, angle made by net force on the block by the surfce is less then `30^(@)` with vertical.
B. When the block is just about to move, the angle made by net force by the surface on the block become equal to `30^(@)` with vertical.
C. When the block starts to accelerate, the angle made by net force by the surface on the block becomes constant and equal to `30^(@)` vertical.
D. The angle made by net force with vertical on the block by the surface, depends on the mass of the block.

Answer

A, B, C, D