Angular Momentum and Its Conservation • Angular momentum is … L= I w • 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= I f w f • 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