A moving particle is acted upon by several forces F1 , F2 , F3 ,..... etc. One of the force is chosen, say F2 , then which of the following statement about F2 will be true.
(A) Work done by F2 will be negative if speed of the particle decreases.
(B) Work done by F2 will be positive if speed of the particle increases
(C) Work done by F2 will be equal to the work done by other forces if speed of the particle does not change
(D) If F2 is a conservative force, then work done by all