I have the following multiple choice question that I am attempting to answer:
For B1.3, (a) appears to be the most logical choice. It is my understanding that an object whose shape is asymmetric about the spin axis will result in an angular momentum vector not aligned with the spin axis which makes (c), (d) nonviable answers.
Additionally, for (c) nonzero linear or angular momentum means there is kinetic energy so that is definitely not correct.
Kinetic energy is a scalar, not a vector thus it has no direction which discounts (b) and (e) as answers.
B1.4 (a) or (b)?
Changing the thickness of one sheet would change the angular momentum but the rotation axis would still not be symmetrical so the spin axis and angular momentum would still not be aligned which makes (c), (d) and (e) invalid (as well as (e) making the assertion that kinetic energy has direction).
I'm a little confused as to what is implied by "dynamic bearing reactions". The way the cube is rotated about the spin axis means there is a couple and changing the thickness of one sheet would unbalance this couple - am I on the right track with this line of thought and have I made any conceptual errors in my reasoning so far?