Angular Momentum and Its Conservation

•Angular momentum is … L=Iw•Angular momentum is conserved…The total angular momentum of a rotating body, in a closed system, remains constant, if net torque is zero.•I =w Ifwf •See Example 8-16•See Holt Example 8-D (available online …control panel/Holt text)

Vector Nature of Angular Quantities

• , , w a and L can be treated as vector quantities.

• We use the right-hand rule to determine the direction of these vector quantities.

• See page 230 for right hand rule.

Homework

•P238 57,58,66,70,47a• Lab on Rotational Kinetic Energy and

Angular Momentum Wed.• Test chapter 8 Thursday