Download presentation

Presentation is loading. Please wait.

Published bySemaj Province Modified about 1 year ago

1

2
Potential Energy Chapter 8 Lecture #1 BY: Dr. Aziz Shawasbkeh Physics Department

3
Outline Potential Energy Conservative forces Determining of potential energy Conservation of Mechanical Energy Potential Energy Curves Work done by non-conservative forces Conservation of total energy Mass and Energy

4
Potential Energy: The Energy associated with the configuration of a system of objects that exert forces on each other Example: Gravitational Potential Energy. Elastic Potential Energy in a spring. Work and Potential Energy: Throwing Pumpkin up: UiUi UfUf mgd

5
Dropping Pumpkin Down: UfUf UiUi mgd

6
Elastic Potential Energy:

7
Conservative forces a b 1 2 A force F acts on an object The object moves along two different paths If W ab1 = W ab2, Then F is conservative

8
The net work done by a conservative force along any closed path is zero W ab1 = W ab2 W ab2 = -W ba2 W ab1 -W ab2 = 0 W ab1 + W ba2 = 0 Closed Path: Conservative force: a b 1 2

9
Examples Gravitational Force: W g = mgh h Elastic force:

10
Determining Potential Energy: Example: Gravitational Potential Energy

11
Take reference point at y i = 0, U i =0, Then Elastic Potential Energy

12
Conservation Of Mechanical Energy If forces acting on the body are conservative

13
Example: Free falling body h

14
Example: At point x= 0 At point x= A

15

Similar presentations

© 2016 SlidePlayer.com Inc.

All rights reserved.

Ads by Google