For example: i) Someone lifts 2kg flowerpot 1m vertically upward. The work done by the gravity is -19.62 J? Then, if ii) A 3kg box on the floor is lifted vertically up onto the head and then lowered down to the shoulder. The shoulder is 150cm while the top of the head is 175cm measured from the floor. The work done is -44.2 J right? due to a = -9.81 as the motion of vertically upward is opposes the motion of gravitational force right? But it is written as 44.2 J in the answer sheet. Please someone explain to me further. I'm confused between - and + value of work done. Is the - sign just indicates the opposite motion and don't need to be written as the answer or vice versa?