A 10-kg block is placed on a horizontal surface. The coefficient of friction between them is `0.2`. A horizontal force P = 15 N first acts on it in the eastward direction. Later, in addition to P a second horizontal force Q = 20 N acts on it in the northward direction.
A. The block will not move when only P acts, but will move when P and Q act.
B. If the block moves, its acceleration will be `0.5 m//s^(2)`.
C. When the block moves, its direction of motion will be `tan^(-1)(4//3)` east of north.
D. When both P and Q act, the direction of the force of friction acting on the block will be `tan^(-1)(3//4)` west of south.
