Thrilling Experiments: Potential and Kinetic Energy

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Name Fact Quiz (cont.) Answer the following questions. 10. If a person tries to push a car that has its hand brake on and the car doesn’t move, is work being done on the car? 11. If the person manages to move the car a distance of 2 meters in 2 seconds by applying a force of 300 N in the direction of movement: How much work is done? 12. Gravitational potential energy is always measured in terms of an object’s position relative to another position. Relative to the floor, what is gravitational potential energy associated with a 10 Kilogram mass that is 2.5 meters above the floor? 13. If the potential energy stored in a spring is equivalent to 300 Joules, how much work could it do? 14. If 200 Joules are used to wind up the spring of a clockwork motor, neglecting friction, how much work is done? 22 After Viewing Quiz Thrilling Experiments: Potential and Kinetic Energy © Sunburst Visual Media, a division of Global Video, LLC
Extensions • Clipped Car Investigation Distribute the following materials to each group of students: a 30-inch length of string, a small, freely rolling toy car, a paper clip opened to serve as a hook, a variety of weights that can be attached to the paper-clip hook, and a stopwatch. Divide the class into small groups, distributing the necessary materials to each group. Instruct students to set up their experiment by tying one end of the string onto the toy car and the other end to the paperclip hook. Have students place their cars on a flat table or desktop and hang the paperclip hook over the edge of the table. Calling attention to the variety of weights each group has been given, ask students to predict how the cars will move if different weights are hung from the paper-clip hook and allowed to fall to the floor. Possible predictions might include: (1) as the weight increases, the car will move with increasingly higher constant speeds toward the edge of the table; (2) different weights will have no effect on how the car moves; (3) as the weight increases, the car will move toward the edge of the table with greater and greater acceleration. (Correct prediction: the car will move with greater acceleration as the weight increases.) After students have made their predictions, ask them to support them by creating illustrated diagrams using arrows and labels to indicate the forces and counter forces acting on the car. Once the charts are complete, have students conduct experiments using the cars, weights, and stopwatch to confirm or refute their predictions. Students should record the results of their experiments. Extension/Challenge: Challenge them to determine a mathematical relationship between the mass of the car and the weight of the object attached to the paper-clip hook. • Gravity Writing Initiate a class discussion about gravity and how it affects us each day. Now ask students to write a short story about what a typical day would be like if there was no gravitational force. Students must include descriptions of normal activities, such as eating meals, sleeping, going to school, participating in a sport, etc. • Science at the Dam Students can study the development of hydroelectric dams in the Tennessee Valley and the Northwest used to turn the potential energy and kinetic energy of falling water to produce electrical energy to do work. Students can then listen to and read the lyrics of Woodie Guthrie's songs about the Columbia River and the Grand Coulee Dam. Students may also read and discuss Ken Kesey's vivid and physically accurate description of a downhill escape on a railroad handcar, in the novel A Sailor Song. © Sunburst Visual Media, a division of Global Video, LLC Thrilling Experiments: Potential and Kinetic Energy Additional Resources 23
Page 1 and 2: Teacher’s Guide Thrilling Experim
Page 3: Table of Contents Guide Information
Page 6 and 7: Program Overview Thrilling Experime
Page 8 and 9: Name Word Splash Each of these word
Page 10 and 11: Name Albert Who? The video you will
Page 12 and 13: Name Vocabulary Cloze Vocabulary wo
Page 14 and 15: Name Energy Basics In the video, de
Page 16 and 17: Name Energy Math Potential and Kine
Page 18 and 19: Name Energy Law In the space below,
Page 20 and 21: Name Vocabulary Match-Up Draw a lin
Page 24 and 25: Extensions Additional Resources •
Page 26 and 27: Extensions • Soda Towers Have stu
Page 28 and 29: Suggested Reading List Additional R
Page 30 and 31: Internet Sites Additional Resources
Page 32 and 33: 32 Answer Key - Before Viewing Acti
Page 34 and 35: 34 Answer Key - Before Viewing Acti
Page 36 and 37: 36 Answer Key - During Viewing Acti
Page 42 and 43: 42 Heads Up! Answer Key - After Vie
Page 44 and 45: 44 Fact Quiz Fill in the missing wo
Page 46 and 47: Script 46 CAST Tony “Thrill” Hi
Page 48 and 49: Script 48 JUNE This experiment need
Page 50 and 51: Script 50 TONY All right I have the
Page 52 and 53: Script 52 You need to repeat these
Page 54 and 55: Script 54 TONY Just like the one in
Page 56: Script 56 JUNE You got it, Tony. I

Thrilling Experiments: Potential and Kinetic Energy

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