Answers

2014-06-13T11:35:39+05:30
Let the mass of satellite be m and velocity be v.
Distance b/w satellite and center of earth,r=6400+1000=7400
The necessary centripetal force for satellite to revolve around the earth is  given by the gravitational attraction b/w earth and satellite  
i.e   \frac{GMm}{ r^{2} } = \frac{m v^{2} }{r}
 \frac{GM}{r}= v^{2}
 v^{2} = \frac{6.67 * 10^{-11} * 6 * 10^{24} }{7400}
v= \sqrt{400.2 * 10^{10} }
v=2 *10⁶ ans .....
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