Energy Skate Park activity: Calculations with Conservation of Mechanical Energy using time graphs https:/phet.colorado.edu/en/simulation/energy-skate-park Energy Skate Park Learning Goals: Students will be able to use Energy-Time graphs Estimate a location for the Skater on a track. Calculate the speed or height of the Skater Predict energy distribution for tracks with and without friction. DOWNLOAD Without using the simulation predict the answers to the EMBED following questions. Directions: 1. This graph below was made with the 50 kg Skater riding on the track shown. The Skater was initially positioned on the top left of the track. Without using the simulation provide a prediction to the following questions. Energy Graph Time Energy Graph 2500 Position Time Kinetic . Potential . " XX XXXX XXXX Thermal . -1250-- -- Total. 2500 14 Time ( S ) O Reference Height . Energy Skate Park PHET: 2. Use the Skate Park simulation to check your answers and make corrections. a) Indicate where the skater is located on the ramp for the associated positions marked (i, ii, iii, and iv) on the graph. Provide a screenshot for each of the positions on the ramp. 3 3 2 b) Calculate the skater's height at the associated positions marked (i, ii, iii, and iv) on the graph. All work must be provided. c) Calculate the skater's speed at the associated positions marked (i, ii, ili, and iv) on the graph. All work must be provided. iii d) Provide a screenshot of the Skater and graph up to 20s 3. Predict the answers to the following questions assuming the same Skater and track setup from #1 but with the Friction slider is set to 'Lots'. a) Sketch a prediction of what the KE and PE graph might look like between 0 and 12 seconds b) Predict how you believe the skater's position will be affected (both horizontal and vertical). c) Predict how do you think the skater's speed on the track will be affected? 4. Using the simulation respond to the following questions from #3. Be sure to move the Friction slider to 'Lots'. a) Provide a screenshot of the Skater and graph from 0 to 12 seconds b) Discuss how the skater's position is affected (both horizontal and vertical). c) Discuss how the skater's speed is affected