21-potential energy 1

# 21-potential energy 1 - Phys 211 3/16/09 Chapter 8...

This preview shows pages 1–7. Sign up to view the full content.

Phys 211 3/16/09 Chapter 8 Potential Energy Conservation of Energy

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

View Full Document
Schedule CAPA Sessions Today and Tomorrow - See Syllabus Tedeschi CAPA 1:25-2:15 pm OfFce Hours - 2:30-4:00 Today and Tomorrow Homework Due - Wednesday 11:59 pm Start Chapter 9 on ±riday if possible
Work-Energy Review Kinetic Energy K = 1 2 mv 2 Work W = Δ K = F d Constant Force W s = 1 2 k x 1 2 x 2 2 ( ) Spring Force F = k ( x x 0 ) = k d Power P AVG = Δ W Δ t P = dW dt = F cos φ dx dt = F cos v = F v Work transfers energy - sign indicates direction of transfer

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

View Full Document
Potential Energy At top, KE=0 At bottom, KE 0 W = Δ K = F d Where does kinetic energy go when the ball reaches the top? Potential Energy of the System Δ U = W Energy of Arrangement of objects of a system (need at least two objects)
Spring Box System Box loses kinetic energy as spring compresses Spring-box system gains potential energy Note that the spring-box and earth ball systems are reversible

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

View Full Document
Conservative Forces
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 10/03/2011 for the course PHYS 211 taught by Professor Pettie during the Spring '08 term at South Carolina.

### Page1 / 15

21-potential energy 1 - Phys 211 3/16/09 Chapter 8...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online