117. (a) The thrust is
Rv
rel
where
v
rel
= 1200 m/s. For this to equal the weight
Mg
where
M
= 6100 kg, we must have
R
= (6100) (9.8)/1200
≈
50 kg/s.
(b) Using Eq. 942 with the additional effect due to gravity, we have
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 Spring '08
 Any
 Physics, Gravity, Harshad number, Trigraph, Kilogram, 102 kg, 50 kg

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