8.0 m -4.0 m 1. A sled is at rest on a rough inclined hill rising at 30 and 8.0 m long as shown in the figure. The coefficient of kinetic friction on the hill is 0.40. What is the velocity of the sled when it reaches the bottom of the hill. 2. The inclined hill and the horizontal surface are made out of different materials and have a different coefficient of kinetic friction. Assuming that the sled will come to a stop at a distance of 4 meters from the bottom of the hill, determine the coefficient of kinetic friction between the horizontal surface and the sled. Note: Remember to define your system