1. The problem statement, all variables and given/known data See the picture attached please. I need help understanding the concept of why work is = 0. I don't understand it's explanation. Please bare with me for the silly questions. 2. Relevant equations W=Kf-Ki W=Fdcosθ 3. The attempt at a solution I cant understand why It mentions the normal force acting perpendicular if its being pushed to the left not up.