While recently watching a rocket launch, I had a thought that I was a little bit confused about, involving the basic physics of a rocket launch.
Before ignition, the rocket experiences no net force: the magnitude of the normal force minus the magnitude of the force of gravity combine to cancel each other.
After liftoff, the rocket experiences a net force: the force of thrust minus the force of gravity gives a positive net force upwards.
However, at the moment of ignition, there are three forces: the normal, the gravity, and the thrust (let's assume the engine is at 100% immediately for simplicity).
In the latter scenario, I'd think that the net force would be the normal force + the force of thrust - the force of gravity. When comparing this to the forces after liftoff, there's an additional upward force here (normal force). So, would there be an overall greater net force on the rocket at the moment of ignition compared to after liftoff? I'm sure I'm missing something here, but I can't seem to figure it out!