Chapter 11, Problem 41

The figure shows a rigid structure consisting of a circular hoop of radius R and mass m, and a square made of four thin bars, each of length R and mass m. The rigid structure rotates at a constant speed about a vertical axis, with a period of rotation of 1.2 s. If R = 0.4 m and m = 5.4 kg, calculate the angular momentum about that axis.

Figure: http://edugen.wileyplus.com/edugen/courses/crs4957/art/qb/qu/c11/q41.jpg

My current codez:

g = 9.8
pi = Math.PI

T = 1.2                                        //seconds
R = 0.4                                       //m
m = 5.4                                      //kg
w = 2*pi/T                                  //rad per s

I1 = m*(R)*(R)                            //Inertia of left block(using parallel axis)
I2 = m*R*R/12   m*(R/2)*(R/2)     //Inertia of Top block (using parallel axis)
I3 = I2                                       //Inertia of Bottom block
I4 = 0                                        //Inertia of Right block
Ibox=(I1   I2   I3   I4)                //Inertia of the entire box

Ihoop = m*R*R   m*R*R             //Inertia of Hoop(using parallel axis)

//Angular-Momentum L for a rigid body: L = I*w
L = (Ibox Ihoop)*w
----------------------------------------------------------------------------------
Generated values:
g = 9.8
pi = 3.141592653589793
T = 1.2
R = 0.4
m = 5.4
w = 5.235987755982989
I1 = 0.936
I2 = 0.288
I3 = 0.288
I4 = 0
Ihoop = 1.728
Ibox = 1.512
L = 16.964600329384886