1 / 8

PE of a

PE of a. A New Kind of Potential: Elastic PE. Consider a toy gun…. Ohh … A DART gun!. What makes the dart shoot out? Where does the Kinetic Energy come from??. PE of a Spring. The Potential Energy ( PE elastic ) of a spring is described by:. PE of a Spring.

lydia-richardson
Download Presentation

PE of a

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. PE of a A New Kind of Potential: Elastic PE

  2. Consider a toy gun… Ohh… A DART gun! • What makes the dart shoot out? Where does the Kinetic Energy come from??

  3. PE of a Spring • The Potential Energy (PEelastic) of a spring is described by:

  4. PE of a Spring • k is the spring constant. Its different for every spring. (N/m) • x is the displacement of the spring. How much its stretched or squished… (m)

  5. Spring Properties • As you pull a spring, it gets harder to pull the farther you go. • This is equally true if you try to compress it from it’s resting state. • The amount of Forceneeded to stretch OR compress a spring is shown by Hooke’s Law:

  6. An Example: • A spring hanging vertically measures 0.3m. When a 1kg weight is attached, the spring stretches to a length of 0.8m. Determine the spring constant.

  7. Another Example: • A spring of spring constant k= 50 N/m is compressed 50cm. How fast will it shoot a 0.010kg dart when released?

  8. Putting it all together • James Bond (80kg) is driving at 80m/s in his Prius when he goes off a 100m cliff. His spring ejection mechanism has a spring constant of k=500 N/m and has been compressed 2m to fit in the car. Unfortunately his parachute fails… How fast is Mr. Bond going to hit the ground?

More Related