When your sled starts down from the top of a hill, it hits a frictionless ice slick that extends all the way down the hill. At the bottom, the ground is dry and level. The effective coefficient of friction between the sled runners and the ground is 0.62. If the hill is 50 m high, how far will your sled travel once it reaches the bottom? How do I solve this problem? I have no clue where to begin, because I thought you would need to know at least the mass and angle of the hill to figure out the velocity and then the distance. Any help?