(26 points) After a snow storm, some students decide to test their physics 1 knowledge by predicting the speed at which their loaded 243 kg sled will have at the bottom of a snow hill. The hill is d = 15.0 m in length and is inclined at an angle of 0 = 30.0, as shown in the figure below. Use energy methods to solve this problem. d A) (6 points) Assuming that the sled starts from rest, what is the sled's energy at the top of the hill? (7 points) The students first prediction models the snow as being frictionless. If the snow is treated as being frictionless, what is the sled's speed at the bottom of the hill? (6 points) The students now refine their prediction and model the snow as having a frictional force of 206 N. What is the work done by the frictional force as the sled goes from the top of the hill to the bottom of the hill? (6 points) Including this 206 N frictional force from the snow, what speed will the sled now have at the bottom of the hill? frictional surface? (1 point) Does the sled have a larger speed when the snow is treated frictionless or