Systems, conservation of energy Thursday, September 3, 2015

Thursday, 9/3 Unit1: Tools for Physics Respond to the following on your warm-up: An Eagle Scout walks 70 meters west to the Canyon wall before turning around and heading back to camp. After walking 40 miles east the scout sprains his ankle. He decides to wait for help. What is the distance and displacement of the scout while he waits? When the scout finally returns to camp what is his distance and displacement? Upcoming dates Wednesday, 9/9 (at 4:00) – last day to turn in missing work for unit 1 (this is a ‘B’ Day) Thursday, 9/10 - Unit 1 test (note this is a date change) For additional quiz and test dates, see my webpage.

Guiding Questions – 15 minutes What is a system? Describe an open, closed, and isolated system. What is energy transformation? How are potential and kinetic energy related? What is energy conservation? Draw a visual representation of energy conservation (the way you see it).

Chrome Books

What is a system A system is a collection of objects

Open system – objects and energy can enter and leave the system. Closed system – objects cannot leave or enter; energy can enter and leave the system. Isolated system – the total amount of energy in the system does not change and there are no external net forces on the system (energy and matter cannot Leave or enter). Diagram source: http://faculty.chem.queensu.ca/people/faculty/mombourquette/Chem221/3_FirstLaw/2_1[1].gif

Transformation Example

Cool Down Explain the concept of energy transformation and conservation.

Around the lab table You will need a sheet of paper to record your thoughts. With your group, complete the questions at the lab stations. You do not have to write the questions, however, they may be helpful for studying! If you have a problem you must show all steps of the GUESS method. I will circulate your groups to answer questions and answer questions.

Flags Decorate your pennant to reflect your aspirations after high school. Starting a career Technical training Military College When finished, turn your pennant over and write your name, and period. Send them up to your row leader Row leader’s put pennant in the black tray.