A) 84mm
B) 74mm
C) 64min
D) 54min
Correct Answer: A
Solution :
Put \[{{g}_{e}}=0,\] in the expression \[{{g}_{e}}={{g}_{o}}-r{{w}^{2}}\] We get \[w=\sqrt{\frac{{{g}_{o}}}{r}}\] \[\Rightarrow \] \[=2\pi \sqrt{\frac{r}{{{g}_{o}}}},\] putting \[r=6.4\times {{10}^{6}}m\] and \[{{g}_{o}}=9.8m/{{s}^{2}}\] We obtain, \[T=84\min \]You need to login to perform this action.
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