Two Work problems I can't figure out. I don't really know where to start? Question1) A delivery person carries a 215N box up stairs 4.20m vertically and 6.80m horizontally. a)How much work does the delivery person do?(Answer: 903 J) b)How much work does the delivery person do in carrying the box down the stairs?(-903J) Question2) A laborer pushes a wheel barrow weighing 200N at 25.0 degrees above the horizontal. If he pushes it a distance of 25.0m, how much work is done?(Answer: 10 700J) Can someone explain in full detail how to reach their answers? I tried them and get nowhere close. Relevant Equations W=Fs W=Fscostheda W=fs=mgs I know that in Q1) a) if you go W=(215N)(4.20m) = 903J However, what do we do about the 6.80m? Also.. Going down the stairs becomes negative 903J? Is that becomes they go downwards with the box? I really dont know how to properly display my answers for this.