You're standing at the top of a snow-covered hill, sloped at 19.0°. The coefficient of kinetic friction between your sled and the hill is 0.574 . Unfortunately, there's a running stream just at the bottom of the hill, and you don't want to get wet. If you and your sled together have a mass of 79.0, with what speed should you push off with to stop just before the stream, 43.0m down the slope?