What thrust does a 230 g model rocket need in order to have... ?

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a vertical acceleration of 11.0 m/s^2 ON EARTH??

Please help, I don't know how to incorporate gravity...
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If F is the thrust and m the mass of the rocket, the forces on the rocket are F upwards and its weight mg downwards.

The upward acceleration a satisfies:
F - mg = ma

F = m(g + a)
= 0.230(9.81 + 11.0)
= 4.79 N.

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Thank you again.

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