| C | H | A | P | T | E | R 9 |
| Rotational Dynamics |

These women in Bali are carrying temple offerings on their heads. Each load remains balanced in equilibrium as the women walk. The location of any force acting on a pile of offerings, as well as the force itself, determines a quantity called torque. We will see that the net torque acting on a body in equilibrium must be zero. (Nicholas DeVore/Stone/Getty Images)

Copyright © 2007 John Wiley & Sons, Inc. All rights reserved.