Department of Physics and Astronomy
Michigan State University
PHY231 Fall 1997

Lecture 11: September 22

Reading before class: C/J 6.1 - 6.4

Topics and Concepts

• Work is Force x Distance
  • Inertia and Mass
• Kinetic Energy
• Gravitational Potential Energy
• Conservative and Non-conservative Forces
• Work-Energy Theorem

Equations

• W=(F cos theta)s
• SI units of work: joule (J) = Newton x meter (Nm)
• KE = 1/2mv^2
• PE = mgh
• W = KE_f - KE_0

Examples

• Luggage Carrier (C/J example 1, page 161)
• Downhill Skier (C/J example 6, page 166)
• Gymnast on a trampoline (C/J example 8, page 169)

Reading for next class: C/J 6.5 - 6.8

PHY 231

This document http://www.pa.msu.edu/courses/1997fall/PHY231/lect11.html was last updated on 20 August 1997 by Thomas Glasmacher