Hi, We have two slides. Slide A and B. The height difference between the bottom and the top of the slides is the same. However, the angle of inclination of the slides are different. Slide A is a more direct slide while slide B is less direct. If a child slides down both of them, on which one will his speed be greater considering there is friction? Ok, so what I'm thinking is that friction is pathway dependent. The longer it is, the worst the loss of speed. So we just slide slide A will make the child faster. But, my friends say that we should make more calculations because the Normal Force changes. What do we do?