A rocket which is 700000kg(given that the rocket never loses mass) working with 10.000.000 Newton, how much is the acceleration?

Question

basic question, but i was wondering about the gravitation how would you calculate this.

Answer 1

net force=mass*acceleration
10kN-weight=mass*a
10kN-700kg*9.8=700E3kg*a
solve for a

a= 10,000/700 - g

Answer 2

I want to know how it flies if it doesn't burn any fuel...