Drag the skater to the top left position and let it go, stop the simulation when she reaches the top right position. Make sure her starting values are 5.9m high with 1.1m/s speed you can read these values by using the measuring tool (cross needs to be on the designated point to read) after you release and if you read different values release her again until you get the right starting values (the starting height could be 5.90, 5,91, 5.92 or 5.93 since we use only one digit it should give you the correct answer) .