"Calculate Angular Momentum of Rotating Barbell

[luckylauren]

Homework Statement

A barbell consists of two small balls, each with mass 550 grams (0.55 kg), at the ends of a very low mass rod of length d = 20 cm (0.2 m). The center of the barbell is mounted on the end of a low mass rigid rod of length b = 0.3 m (see Figure), and this rod rotates counterclockwise with angular speed 110 rad/s. In addition, the barbell rotates clockwise about its own center, with an angular speed 90 rad/s.

(a) Calculate Lrot (both magnitude and direction).
(b) Calculate Ltrans, B (both magnitude and direction).
(c) Calculate Ltot, B (both magnitude and direction).

Homework Equations

I=m*r^2
w=2pi/T
Lrot=I*w

The Attempt at a Solution

i don't know where to start because it is rotating while it is moving a distance at the same time?!

 

[Phrak]

I don't see a figure. Are the two rotations along the same axis?