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Name ____________________________ Conservation of Energy Title Questions 9-12-16 ______ / 30 pts. What is the effect of the position of the car on the different amounts of energy in the system? Independent Variable: _________________________________________ Dependent Variables: _________________________________________ What do you thinkβ¦ 1 pt will happen to the Eg? ________________________________________________________________ will happen to the Ek? ________________________________________________________________ will happen to the total energy? _________________________________________________________ Hypothesis: __________________________________________________________________________ __________________________________________________________________________________ Materials: Constants: CPO ramp, car and stand Ball bearings CPO timer Clay to stop the car 4 pts Hole Number: _______ Release of Car will be the highest point Mass of Car: _______ g /1000 = _______ kg (Use at least one ball bearing in your car) Positions on the Ramp (Top, Upper, Middle, Lower, Bottom) 0cm 20cm 40cm 60cm 80cm Procedures: 1. Place car at the top of ramp. Measure the amount of gravitational potential energy by measuring its height above the table in centimeters, then subtract 10 cm for the height of the base. Convert it to meters by dividing the amount of cm by 100, and calculate the gravitational potential energy using π¬π = π β π β π . 2. Place the A photo gate on 20 cm from the top of the ramp (each mark is 5 cm). Be sure the timer box is set on interval and only βAβ photo gate light is lit up. Release the car from the top of the ramp. Take the 1cm distance of the flag on the car and divide it by the time on the timer. Convert that number to meters/second by dividing it by 100. π 3. Use the velocity you just found to plug into the formula for kinetic energy π¬π = π π β ππ . 4. Calculate the total amount of energy by adding the amount of gravitational potential energy to the amount of kinetic mechanical energy. 5. Repeat steps 2-5 for the photo gate position of 40, 60, and 80 cm. 6. Create a line graph with three different lines of kinetic energy, gravitational potential energy, and total energy in three different colors. ο· Place all data on the next page. Math Calculations & Data Table(s) Distance of car down ramp (cm) Height of Car at photogate in (cm) minus 10cm Then, Convert to Meters by (Height/100) Gravitational Potential π¬π = π β π β π 4 pts Kinetic Velocity in(cm/s) Velocity in Mechanical (m/s) Convert Energy V=Distance/Time to Meters 1cm/ ________s (velocity/100) π¬ = π π β ππ π Total Energy Ek + Eg = TE π 0 (top) 20 (upper) 40 (middle) 60 (lower) 80 (bottom) 1 Graph (3 Lines) - Graph Gravitational, Kinetic and Total Energy in 3 different colors!! 8 pts Conclusion 6 pts Below write a conclusion of your results including each of the following: Purpose β experimental question put into a sentence Data β explain the averages for each IV group Hypothesis β rewrite the hypothesis and tell if the data SUPPORTED your hypothesis or not Patterns β describe how the IV affected the DV, based on your graph Recommendations β how could your experiment be improved, what are possibilities for error? Players Donβt Hate Players Rock - PDHPR Conclusion: __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ Bar Graphs and Pie Graphs Using the graphs provided below create a pie and bar chart for each of the Photo Gate locations shown in the picture. (5 pts) A β Top B β Upper C β Middle D β Lower E β Bottom A B C D A E A A A A B Ek Eg TE Ek C Eg TE Ek E D Eg TE Ek Eg TE Ek Eg TE 1. Describe what happens to Potential, Kinetic and Total Energy as the car moves down the ramp. (1 pt) 2. Why does the Kinetic Energy for the car at the end of the ramp not match the Potential Energy at the beginning? Where was some of the energy βlostβ? (1 pt)
