Download Names

IP 614
Name: _________________________ Block: ______ Date:____/____/_______
Conservation of Energy
Big Idea: The sum of the kinetic energy and potential energy remains the same
in the absence of work or friction.
Pre-Lab Activity: Run the PHET simulation called: Energy Skate Park:
http://phet.colorado.edu/en/simulation/energy-skate-park. Play around with the
simulation and answer the following questions related to simulation. (**Make sure
you re-set the PE horizontal line to the bottom of the ramp)
1. Use the bar graph to find the positions where the skater experiences maximum
kinetic energy (KE), maximum potential energy (GPE), and where KE = GPE.
2. Click on the Pie Chart box and run your skater through the track again.
Compare what happens to KE and GPE as the skater moves along the track.
What general statement can you make about the relationship between KE and
GPE?
3. Turn on the Track Friction and change the coefficient of friction on the track.
Describe how friction relates to thermal energy and work.
4. Change the condition again after reset so your system is no longer “isolated.”
Describe what changes you did to make the system no longer “isolated.” Explain
how conservation of energy can/cannot be applied to your new system.
IP 614
Small Group Activity:
Task: Create a presentation of conservation of energy for an extreme sport or
activity (such as amusement park rides). Assume that there is no additional work
or friction in the system. Energy is either in the form of potential energy or kinetic
energy and total mechanical energy remains constant. (In some extreme
sports/activities, there might be more than one potential energy: Elastic Potential
Energy & Gravitational Potential Energy).
Extreme Sport/Activity: ___________________________________________
Team Members:
Team Leader____________________________________
Responsible for filling out this page (leading discussions within small groups),
assigning roles, and directing the preparation of the illustrations and chart. In
addition, he/she is responsible for filling out the Group Self-Evaluation Form.
Team Artist ____________________________________
Responsible for drawing the main illustrations of the activity on a large
presentation paper. Request help from teammates for ideas and artwork.
Lead Scientist____________________________________
Responsible for creating and presenting charts of KE, GPE, (EPE), total ME for
4-5 locations on the main illustration. Leading research and calculation that
shows a reasonable amount of total mechanical energy for that activity.
Procedure:
 Choose group roles.
 Choose one extreme sport/activity that will incorporate energy transfer. If
you need ideas, discuss possibilities with your teacher.
 Research one video that shows the activity that you will use for the
commentary potion of the presentation. Make sure you include the following
vocabulary in the commentary: kinetic energy, gravitation potential
energy, conservation of energy, conservation of mechanical energy,
work, and friction, (elastic potential energy).
 Make large picture and smaller charts of GPE, KE, (EPE), and ME for 4-5
locations on smaller construction paper.
 Calculate the amount of total mechanical energy at the beginning of the
activity and show the calculation on the large presentation paper with the
drawings. (This quantitative analysis should be reasonable numbers. i.e.
you might have to do some quick research into height, masses, velocity of
the objects in your activity for your calculation to be realistic.)
 Present to class tomorrow—begin with the video, provide running
commentary. Then explain the details with the large picture and smaller
graphs you constructed.
 Group leader fills out Group Self-Evaluation Form and hands in.
IP 614
Group Self-Evaluation Form
(to be completed by Team Leader and handed in at end of class)
Team Leader:
Team Artist:
Lead Scientist:
Presenter:
______________________________
______________________________
______________________________
______________________________
Extreme Sport:
______________________________
Give your group a rating of 1-5 on how well it performed each task.
(1 = poor, 2 = needs work, 3 = acceptable, 4 = good, 5 = awesome)
______ Group quickly chose roles for each member of the team.
______ Group treated all member of the team respectfully.
______ Group encouraged creative and diverse ideas from each member.
______ Group stayed on task, not distracted by socializing or other events.
______ Group finished task efficiently and on time.
Comment on group’s performance and suggestion ideas for improvement.