In this Lab you will explore some ideas about Energy: the Work-Energy Theorem. the Conservation of Mechanical Energy. etc. We will dene a Conservative Force as a Force such that the Net Work of this Force around a closed path is 0 J: an example of such a Force is Gravity. This may make intuitive sense. Gravity will "help" an object fall 5 m. but then will 'hurt' the object's efforts to rise 5 m. The "help" and "hurt" cancel out. hence the Net Work is 0 J. Other examples of Conservative Forces are the Ideal Spring Force and the Electromagnetic Force. To start. choose the "Intro\" option and start the simulation. Make sure you have expanded the Energy chart in the top left hand corner. and selected the Reference Height option in the bottom left hand corner. Place your skater on the U-shaped track and observe the energy prole during the skater's motion. As the skater moves on the uashaped track. what is the trend regarding the Kinetic and Potential energy graphs? r. v Pause the skater's motion. Move the reference line (dashed blue line) up and down and observe the energy graph. Moving the reference line to a different position is like dening a new coordinate system. Which types of energy are dependent on your choice of coordinate system? (Select all that apply-} O Potential Energy 0 Kinetic Energy 0 Thermal Energy 0 Total Energy When the mass of interest is close to the surface of the Earth. we define Gravitational Potential Energy to be: PEg-rm-tationnl = High This depends on the height. which as you've seen. can change just by moving the origin. But. how is the change in height affected by our choice of origin? Find the Change in Height in the given direction. assuming each value is given along the height dimension: From -23 units to -21 units. the change is units. From 43 units to 45 units. the change is units. From 10 units to 12 units. the change is units. Now. nd the Change in Height in the opposite direction. assuming each value is given along the height dimension: From -100 units to 402 units. the change is units. From -34 units to -36 units. the change is units. From -73 units to 430 units. the change is units