h3 = −A (P cos γ − R sin γ) sin γ + K cos γ;
(8)
and the dynamical equation
| dh3 | − h1Q + h2P = N, |
| dt |
(9)
with K constant, and with preponderance downward
N = gMh cos zY sin γ = gMh sin γ sin θ cos φ,
(10)
reduces to
| A | d2φ | sin γ + Aμ2 sin γ sin2 θ sin φ cos φ |
| dt2 |