Two children are sliding down a snowy hill which is inclined by 49.3 degrees with respect to horizontal. One has a rough sled which has a coefficient of kinetic friction between it and the snow of μk = 0.328; the other has a slippery sled which has a coefficient of kinetic friction between it and the snow of μk = 0.187. If both children start at the top of the 44.7 m tall hill initially at rest.
What is the difference in speed between these two sleds at the bottom of the hill?