University:
Boston University
Course:
CAS PY 105 | Physics 1
Academic year:

2024
Views:

117

Pages:

2
Author:

cengladaqwt9

Law of Conservation of Energy: Kinetic and Potential Energy AGENDA: Students should be able to understand the concepts of the law of conservation of energy and the principles of kinetic and potential energy, including understanding the principles behind the law and it's various applications. Differentiate between potential and kinetic energy. Identify situations where kinetic energy is transformed into potential energy and vice versa. STANDARD 1: Recognize, interpret, and be able to apply their knowledge of the law of conservation of energy to real life surroundings. STANDARD 2: Recognize, interpret and understand the concepts of kinetic and potential energy, how they are related, and how they apply to real life surroundings STANDARD 3: Present and explain data findings. Record their observations on kinetic and potential energy Time Frame: 1 class period (45 min) Materials: lead weight as a bob, thread (about 1m), ringstand or hook, stopwatch 1) Activator: Question/Answer session on what students think conservation of energy is Provide examples of energy. Describe what kinetic and potential energy is and how they may be transformed into one another. (No more than 10 minutes) 2) Instruction/Interaction: a) Form teams. Students are to attach the lead weight to the string. Attach the string to a ringstand or hook making a pendulum approximately 50 cm in length. b) Not touching the pendulum, measure the distance from the table to the end of the weight. c) Pull the weight approximately 15 cm to one side and let it go. Record observations. Record the time it takes for the bob to get to the "middle of the swing." d) Pull the weight approximately 30 cm to one side and let it go. Record observations. Record the time it takes for the bob to get to the "middle of the swing." (ideally approx 20 min) 3) Discussion/Results: Discuss how the two energies were transformed and how they were conserved (approx 10min) 4) Wrap Up / Assessment: Complete Worksheet (approx 5min) 5) Worksheet Questions: a) State the law of conservation of energy, the definition of kinetic energy and the definition of potential energy. b) At what position was the kinetic energy the greatest? c) At what position was the potential energy the greatest? d) What was the source of this kinetic and potential energy? e) Describe the relationship you found between the potential and kinetic energy as a pendulum swings. Will the pendulum swing forever? Why or Why not?