فيزياء: أي استفسار أول سؤال

[روزاليندا&MJ]

السلام عليكم دكتور ممكن عندي سؤال بسيط عبارة عن
particle moves along x axic . Does the kinetic energy of the particle increase decrease, or remain the same if the particle's velocity changes (a) from -3 to -2. b) -2 to2 (c)In each situation, is the work done on the particle + or- or zero