All rockets are stationary before launch. Even if being carried by an external object, such as a 747 or a F1-11. They are stationary in relation to their launch vehicle.
The answer to your question is determined by the type of rock that you are referring to. There are many types that have specific purposes. There are homemade rudimentary rockets that are composed...
T means the Time of launch -- when the launch is planned to happen. T minus is the number of seconds before the rocket is to launch. T minus four seconds and counting means it is four seconds in the...