Please refer to the image attached to answer question 16, (all that is needed to answer the question is above the green box:

6' = w w' = mg sin6 By choosing a unit system in which mg 2 1, the differential equation reduces to 9' = w I w =sin9 Notice that this is highly nonlinear: it is certainly not the case that the sine function is linear; sin (X + Y) is definitely not sinX lsin Y, and sin(6 >