1 / 7

Energetically Challenged

Discover the fascinating interplay between linear and rotational forces as you explore the concept of energy in motion. Delve into the mechanics of friction, torque, and the moment of inertia while applying these principles to a practical mousetrap car project. Learn how weight affects energy expenditure during activities like hiking, and understand the differences between potential and kinetic energy. Utilize calculations and experiment with ways to enhance your mousetrap car's efficiency through troubleshooting, redesigning, and rebuilding.

baruch
Download Presentation

Energetically Challenged

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Energetically Challenged Maximize your mousetrap potential

  2. Re-cap • Linear Forces: Friction • Proportional to Normal force • Static Friction opposes relative motion of two surfaces • Coefficients of friction found experimentally • Rotational Forces: Torque • Torque causes angular motion • Moment of inertia found for drive axle Wcar N Fs Fs N N T Wmass

  3. Work and Energy • You (120 lb) and a friend (150 lb) go hiking (uphill) after eating ½ of a pizza. • Who will use more energy as they are hiking? • Who will be able to hike farther (higher)? • Why do you make these predictions? • What is the unit of energy that people track? • How is this hiking example similar to your mousetrap car?

  4. Work and Energy • Your heavier ‘friend’ will use more energy: his weight (a force) is higher, so he will use more energy over the same distance. • Because you and your friend start with the same amount of energy (calories from the ½ pizza), you will be able to go farther than your friend.

  5. Energy: Potential and Kinetic • Potential energy: an object at rest • Apple before falling from tree: • Mousetrap arm when trap is set: (calculated from transferred force) • Kinetic energy: an object in motion • Apple falling from tree • Mousetrap car in motion

  6. Putting it together • Energy efficiency can be calculated, improved by analyzing work done by forces • Mousetrap arm • Friction • Torque

  7. Max Your Ride • Follow workbook to calculate efficiency of current model car • Use what you know: past experiments • Propose improvements • Troubleshoot, Redesign, Rebuild!

More Related