{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# lecture22 - Energy Examples Serway and Jewett 8.1 8.3...

This preview shows pages 1–5. Sign up to view the full content.

Physics 1D03 - Lecture 22 Energy Examples Serway and Jewett 8.1 – 8.3

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Physics 1D03 - Lecture 22 Conservative Forces A force is called “conservative” if the work done (in going from some point A to B) is the same for all paths from A to B. An equivalent definition: For a conservative force, the work done on any closed path is zero. Later you’ll see this written as: Total work is zero. path 1 path 2 A B W 1 = W 2
Physics 1D03 - Lecture 22 If only conservative forces do work, potential energy is converted into kinetic energy or vice versa, leaving the total constant. Define the mechanical energy E as the sum of kinetic and potential energy: E K + U = K + U g + U s + ... Conservative forces only: W = -∆ U Work-energy theorem: W = K So: K +∆ U = 0 Conservation of mechanical energy

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Physics 1D03 - Lecture 22 Concept Quiz You drop two rocks from top of a building. One has mass m and the other mass 2m . When they hit the ground A) they have the same speed and same kinetic energy
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern