Potential & Kinetic Energy

1. Energy is the ability to cause change. What is energy? 1. Energy is the ability to cause change. Everything around you has energy, but you notice it only when a change takes place. 2. Anytime a change occurs, energy is transferred from one object to another. Instructional Approach(s): The teacher should present the information on the slide while the students record the important information on their graphic organizer.

Is energy involved? A bowling ball rolls down the alley and knocks down some pins. 3. Yes. A change occurs when the pins fall over. The bowling ball causes this change, so the bowling ball has energy. Instructional Approach(s): The teacher should present the information on the slide while the students record the important information on their notes.

Kinetic Energy and Speed 4. What happens when you roll a fast ball? A faster ball causes more change to occur than a ball that is moving slowly. Kinetic energy increases as an object moves faster. Instructional Approach(s): The teacher should present the information on the slide while the students record the important information on their notes.

Kinetic Energy & Mass 5. Which has more energy volleyball or bowling ball? Explain Even though the bowling ball is moving at the same speed, it has more kinetic energy because it has more mass. Kinetic energy increases as the mass of an object increases. Instructional Approach(s): The teacher should present the information on the slide.

The Basics of Kinetic Energy 6. Kinetic Energy is the energy of motion. 7. Increasing mass or velocity Increases the KE. KE = ½ mV² Instructional Approach(s): The teacher should present the information on the slide while the students record the important information on their notes.

Potential Energy 8. What happens to the Potential Energy of the bowling ball if the table is higher? The PE is greater if the position of the object is higher. The object has the potential to cause more change. Instructional Approach(s): The teacher should present the information on the animated slide while the students record the important information on their notes.

Potential Energy 9. How does mass affect the Potential Energy of an object? The more mass an object has, the more PE it has because it has the “potential” to cause more change. Instructional Approach(s): The teacher should present the information on the animated slide while the students record the important information on their notes.

The Basics of Potential Energy 10. Potential Energy is stored energy. 11. Increasing mass and height increases PE. PE = mgh Instructional Approach(s): The teacher should present the information on the slide while the students record the important information on their notes.

12. What if the bowling ball is not moving and sitting on the ground 12. What if the bowling ball is not moving and sitting on the ground. Does it still have PE energy? No PE. Even though it has mass its height is zero. Instructional Approach(s): The teacher should pose the question to the class or call on students to answer the question.

13. Energy Skate Park Ke and PE Transformation The decrease in PE energy equals the increase in KE energy. The total amount of energy remains the same (constant) . Instructional Approach(s): The teacher should present the information on the slide while the students record the important information on their notes.

14. Energy Transformation in a Pendulum Where have you seen pendulum motion? grandfather clock Swing Golf swing

Changing Kinetic & Potential Energy Instructional Approach(s): The teacher should use the link to demonstrate the relationship between kinetic and potential energy. Pendulum http://www.physicsclassroom.com/mmedia/energy/pe.cfm

15. Draw and Label. Instructional Approach(s): The teacher should use the images on the slide to illustrate the relationship between kinetic and potential energy transformation in a pendulum.

16. How does the Law of Conservation of Energy relate to the pendulum? LoC states- energy can not be created or destroyed it transforms . P.E is continually changing into K.E

17. Why does the pendulum stop swinging? GPE is changed into KE and eventually Thermal energy, caused by friction is transferred into the surrounding air.

18. The Rollercoaster Instructional Approach(s): The teacher should use the link to demonstrate the relationship between kinetic and potential energy. These animations [slides 21-27] are the same animations used in the QR Code activity linked on the resource page and described on slide 18. http://www.physicsclassroom.com/mmedia/energy/ce.cfm

Summarizing Strategy Max P.E Max K.E Instructional Approach(s): Each student should complete the summarizer. The teacher should use the summarizer to determine the level of student mastery and if differentiation is needed.

Changing Kinetic & Potential Energy http://www.classzone.com/books/ml_science_share/vis_sim/mem05_pg69_potential/mem05_pg69_potential.html Instructional Approach(s): The teacher should use the link to demonstrate the relationship between kinetic and potential energy.

Watch the video clip of the cartoon Road Runner Watch the video clip of the cartoon Road Runner. Identify at least two examples of Kinetic Energy and two examples of Potential Energy Instructional Approach(s): The teacher should use the link to demonstrate the relationship between kinetic and potential energy. Students could work individually or with a partner to identify the examples of kinetic and potential energy http://www.youtube.com/watch?v=8H41zbqrwVo

Changing Kinetic & Potential Energy http://www.classzone.com/books/ml_science_share/vis_sim/mfm05_pg126_coaster/mfm05_pg126_coaster.html Instructional Approach(s): The teacher should use the link to demonstrate the relationship between kinetic and potential energy.