Saturn V rocket

Using $F=ma$ , we have $F=2800000\times 9.8=2.744\times 10^7$

The rocket has to apply a force equal to the gravitational force acting on it, so

Force of gravity = mass * acceleration = $2,800,000 \ kg \times (9.8) \ m/s^2 =$ 2.74E+7 Newtons

the mass of rocket is 2,800,000 and the g=-9.8 . so the force is
F=mg, F=2800000*9.8=2.74E+7

Gravity force is m g, if rocket want to fly it needs to get acceleration a=9.81m/s2^, so 2nd Newton's law says F=m a=9.8m/s^2*2.800.000kg=2.74E+7N

F = m.a F = 2.800.000 . 9,8 = 2.74.10^7

The only force that the rocket needs to overcome is the force of the gravity of the Earth.

The force of gravity of Earth, by $F=ma$ , is $2,800,000 kg \cdot 9.8 \frac{m}{s^2}=27,400,000 N$ . The rocket has to have a thrust at least this. Thus, the minimum thrust the engines needed to provide to launch the rocket is $27,400,000N=\boxed{2.74 \cdot 10^7}N$ .