Hi guys! I stumbled upon this truly weird question that seems counter intuitive to me. For the purpose of this question, I'll use x,y,z as unit vectors without the roof because I'm using my phone now.. If F= 160N x - 40N y and s= 14m x +11m y (as stated in the question) is this physically possible? I mean, the y-force is in the negative direction which I would take as downwards, and the displacement is actually positive, or upwards!!! Continuing this question, using scalar product method, I get 1800J as my answer. Thanks!