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Conservation of Mechanical Energy Lab Name ____________________________________ Materials: Computer Red and Blue Color Pencils Procedure: 1. Go to the following website: http://www.teachersdomain.org/asset/mck05_int_rollercoaster/ . A screen will appear similar to the picture below. 2. Click on the step button. Numbers will appear on the screen and the roller coaster car will move to Location 1: top of the first hill. 3. Record the velocity of the car and fill in the pie graph in your data table to represent how much of the Mechanical Energy is Kinetic Energy and Gravitational Potential Energy. 4. Click on the step button. The car will move to Location 2: the bottom of the first Hill. Record the velocity of the car and fill in the pie graph in your data table. 5. Continue hitting the step button and recording the data for each of the six locations. www.njctl.org Data Table: Location Number 1 2 3 4 5 6 www.njctl.org Description of Location Car’s Velocity (m/s) Percentage of Mechanical Energy Questions: 1. How much of the total Energy is Potential Energy at Position One? 2. At position 2, how much of the Potential Energy from Position 1 was transferred to Kinetic Energy? 3. At Positions 3 and 4, the roller coaster car was at a height between position 1 and 2. How did the Kinetic Energy at position 3 compare to the Kinetic Energy at position 4? Explain using relative heights and the velocities at each position. 4. The percentage of Total Energy of the roller coaster car at Positions 2 and 5 was equal with 100% of the Energy being in the form of Kinetic Energy. Explain why the velocities of the roller coaster car was not the same? 5. Based on your answer to number 4, was Mechanical Energy conserved in the investigation? If not, was Energy lost or gained and in what form? What force would have caused the change in Energy? Phase II-Visit the website below and answer the questions on the back of your paper. http://www.learner.org/interactives/parkphysics/coaster.html Or go to Google search amusement park physics design your own rollercoaster Click on design your own rollercoaster and the Begin button-Remember to draw your rollercoaster design as you go 1) How high of a first hill did you select? Why? 2) Reading-What is the relationship of the height of the first hill and the speed of the roller coaster? 3) Reading-What does the shape of the first hill determine? 4) What shape of the first hill did you choose? Why? 5) What exit path did you choose? Why 6) Reading-What is speed directly related to in terms of the exit path? 7) What second hill did you choose? 8) What loop did you choose for your roller coaster? Why did you choose it? 9) Did your roller coaster meet the safety regulations? Why or Why not. 10) Label your rollercoaster in terms of both potential and kinetic energy. If time remains go back and modify your rollercoaster design so that it passes the safety rating and Fun Rating www.njctl.org