b.) If mass increases, what happens to potential energy? Why? c.) If mass increases, what happens to mechanical (total) energy? Why? 5.) Complete the table based on what you observed (circle one answer for each KE and PE box): nclude three screenshots Position (height) of skater on track Kinetic Energy Potential Energy To high medium low high medium low Middle high medium low high medium low Bottom high medium low high medium low 6.) Circle the correct answer with Justifications and use a screenshot to support each situation a.) As the skater goes up the hill, his kinetic energy: increases / decreases / stays constant b.) As he goes up the hill, his potential energy: increases / decreases / stays constant c.) As he goes up the hill, his mechanical energy: increases / decreases / stays constant d.) d) As he goes down the hill, his kinetic energy: increases / decreases / stays constant e.) As he goes down the hill, his potential energy: increases / decreases / stays constant f.) As he goes down the hill, his mechanical energy: increases / decreases / stays constant 7.) What is the relationship between kinetic and potential energy? 8.) What evidence from the simulation supports your claim from question 7? 9.) Check the "speed" box in the upper right comer. What is the relationship between speed and KE? 10.) What happens to the total (mechanical) energy of the skater as time passes? whyEnergy Skate Park Simulation Pre-Lab Reading: Kinetic Energy (KE) is the energy of motion. Any object that is moving has kinetic energy. Potential Energy (PE) is the energy an object has due to its position or condition. In this simulation, we will be focusing on a specific type of potential energy: gravitational potential energy (GPE). Mechanical Energy is the total energy an object has: the sum of kinetic energy and potential energy. The law of conservation of energy states that energy cannot be created or destroyed, but can be transferred from one form to another. This means that if an object has a certain amount of energy, it will keep that energy unless the energy is transferred to another object. Procedure (answer all questions that follow]: LINK FOR SIMULATION: https://phet.colorado.edu/sims/html/energy-skate-park/latest/energy- skate-park_en.html 1.) Check the "Grid" and "Bar Graph" boxes in the top right comer. Keep them always open. 2.) Explore the simulation, trying the various track designs in the top left corner. Observe how the skater's potential and kinetic energy change as he moves. Record your initial observations below: Include one Screenshot 3.) Switch to the U-shaped track. Drag the skater to the top of one side, then let him go. Observe the energy bar graph as he goes back and forth. You may also explore the W-shaped track. a.) When does the skater have the highest potential energy? b.) When does the skater have the lowest potential energy? c.) When does the skater have the highest kinetic energy? d.) When does the skater have the lowest kinetic energy? 4.) While he is moving, change the mass using the slider on the right side. Observe the energy graph. a.) If mass increases, what happens to kinetic energy?11.) Switch to the "Friction" tab at the top of the page. Turn friction on using the button on the right side of the page. What is different about the skater's motion with friction, compared to without it? 12.) Compare how a small amount of friction affects the motion of the skater to how a large amount of friction affects his motion. 13.) Re-read the law of conservation of energy in the pre-lab section. What do you think happens to the skater's energy when friction is involved? (Look back to questions 11 and 12.) 14.) An archer stands on the ground and fires an arrow at a target. A second archer stands at the top ofa building and holds an arrow in his hand. Which arrow has more potential energy? Explain. 15.) In the same scenario described in question 7, which arrow has more kinetic energy? Explain