Department of Physics and Astronomy
Michigan State University
PHY231 Fall 1997

Lecture 12: September 24

Reading before class: C/J 6.5 - 6.8

Topics and Concepts

• Conservation on mechanical energy
• Power
• Other Forms of Energy

Equations

• W_nc=E_f - E_0
• = (KE_f +PE_f) - (KE_0 + PE_0)
• SI unit of power = watt (W) = J/s
• P = W/t = Fv

Examples

• Daredevil Motorcyclist (C/J example 9, page 175)
• Magnum XL-200 (C/J example 12, page 178)
• Magnum XL-200, revisited (C/J example 13, page 179)
• Power to accelerate a car (C/J example 16, page 182)

Reading for next class: C/J 7.1-7.2

PHY 231

This document http://www.pa.msu.edu/courses/1997fall/PHY231/lect12.html was last updated on 20 August 1997 by Thomas Glasmacher