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Thesis - Leigh Moody.pdf - Bad Request - Cranfield University

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Appendix G / Gravity<br />

_ _<br />

g : = g + G − G − ω × ω ×<br />

p<br />

d<br />

p<br />

20-4<br />

d<br />

C,<br />

E<br />

C,<br />

E<br />

P<br />

d,<br />

p<br />

Equation 20.2-1<br />

Newton's universal law of gravitation states that the mutually attractive<br />

force (F) acting along a vector between two homogeneous masses a distance<br />

(Pr,p) apart,<br />

F<br />

: =<br />

G ⋅ M ⋅ m<br />

P<br />

2<br />

r,<br />

p<br />

⇒<br />

P&<br />

&<br />

r,<br />

d<br />

: =<br />

G ⋅ M ⋅ P<br />

−<br />

P<br />

3<br />

r,<br />

p<br />

r,<br />

d<br />

Equation 20.2-2<br />

(G) is the universal gravitational constant 6.673 x 10 -11 m 3 /(kg.s 2 ), (m) the<br />

vehicle mass referenced to point (p), and (M) is the Earth's mass. For nearearth<br />

studies Pd,p

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