The “Chandler wobble” is this curve applied to the Earth’s rotation. For 10 points each:
[10h] Name this curve traced out on Poinsot’s (“pwann-SOH’s”) ellipsoid, useful for visualizing the motion of rigid bodies with three unequal moments of inertia. A related curve traced out on the invariable plane prefixes “her-” to this word.
ANSWER: polhode (“PAWL-hode”) [or herpolhode]
[10m] The polhode is traced by this quantity on Poinsot’s ellipsoid. Euler (“OY-ler”) forces are present if this quantity changes for a rotating frame, and this pseudovector is crossed twice in the expression for centrifugal force.
ANSWER: angular velocity [or rotational velocity; prompt on omega; reject “angular speed” or “angular frequency”]
[10e] Poinsot’s ellipsoid is defined as a constant surface of this scalar quantity, which is equal to “one-half capital I times omega squared” for a rotating rigid body.
ANSWER: kinetic energy [or KE; prompt on energy; prompt on T or K]
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