A skier begins skiing straight down a hill having a constant slope, starting from rest.If fri ght down a hill having a constant slope, starting from rest. If friction is negligible, as the skier goes down the hill, his/her A. acceleration increases with time. B. acceleration is constant, with a value of roughly 10 m/2. C. acceleration is constant, with a value less than 10 m/s2. D. acceleration is zero.