A 20000 kg rocket has a rocket motor that generates 3.0*105 n of thrust. part a what is the rocket's initial upward acceleration?

From the Newton’s first law, force is simply the product of mass and acceleration. The formula is given as:

Force = mass * acceleration

So given a mass of 20,000 kg and a force of 3 x 10^5 N, we can calculate the acceleration:

acceleration = Force / mass

acceleration = 3 x 10^5 N / 20,000 kg

acceleration = 15 m/s^2