- #1

marco12345a

- 13

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To escape velocity on Earth = (2G Mearth / r earth) = 11200ms-1

So the total velocity that needed for the rocket = 11200 - 393.11= 10806.99ms-1

I am trying to find the total energy that is needed for the rocket of 1000kg to escape velocity

i used the question

m = 1000 x 9.8 N

E= 1/2 m^2

= 5.84 X 10^10 J

my question is : as the further you are away from earth, there will be less gravity. So if i use that equation, would that be accurate assume there is no air friction and the mass of the rocket doesn't change due to the loss of fuel