L2_19.pptx - Topics for Today Post-game analysis of first...

Info icon This preview shows pages 1–6. Sign up to view the full content.

Topics for Today Post-game analysis of first exam (Kletzing) Potential energy (8-1) Conservation of mechanical energy (8-2)
Image of page 1

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

Work and Potential Energy We’ve seen how work (in the physics sense) can increase the kinetic energy of an object. Work can also be used to put in energy that is stored in a system. This is called “Potential Energy” Energy can be transferred between potential and kinetic. 1.Start with ball at lowest point. 2.Do work to move ball up. 3.Release ball – energy changes from potential to kinetic and back.
Image of page 2
Work and Potential Energy Quiz - If the pendulum ball is released from a given height, can it go higher on the return swing? 1. Yes 2. No •. Do demo 1M40.10 - Large Classroom Pendulum
Image of page 3

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

Work and Potential Energy We use the symbol U for potential energy. The change potential energy Δ U = - W . Let’s see if this makes sense for a mass in a gravitational field. Quiz - When I lift the mass, does the potential energy? 1. Increase 2. Decrease
Image of page 4
Work and Potential Energy Potential energy increases when I lift the mass. What is the work done when I lift the mass? The force (gravity) points down, while the displacement is up.
Image of page 5

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

Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    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.

    Student Picture

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

  • Left Quote Icon

    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.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    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.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern