Forces acting on the rocket immediately after leaving the launch pad:

1. Thrust:
- The first force acting on the rocket immediately after leaving the launch pad is the thrust force.
- Thrust is the force generated by the rocket's engines that propels it forward and overcomes the force of gravity.
- It is produced by the expulsion of high-speed gases out of the rocket's engines in the opposite direction to the desired motion.
- The rocket's engines burn fuel, typically a combination of liquid oxygen and rocket-grade kerosene, to produce combustion gases.
- These gases are expelled through the nozzle at a high velocity, creating a reactive force in the opposite direction.
- According to Newton's third law of motion, for every action, there is an equal and opposite reaction.
- Therefore, the expulsion of gases generates a force in the opposite direction, pushing the rocket forward.

2. Weight (Gravity):
- The second force acting on the rocket immediately after leaving the launch pad is the force of gravity.
- Gravity is the force of attraction between two masses, and it pulls the rocket downward toward the Earth.
- The weight of the rocket is the force exerted on it by the gravitational pull of the Earth.
- Gravity acts vertically downward from the center of the Earth towards the rocket's center of mass.
- The force of gravity decreases with altitude, but it remains significant even after leaving the launch pad.
- As the rocket ascends, the force of gravity gradually weakens, but it continues to act on the rocket and affects its trajectory.

Conclusion:
- After leaving the launch pad, a rocket experiences two primary forces: thrust and weight (gravity).
- Thrust is generated by the rocket's engines and propels it forward, while weight (gravity) pulls the rocket downward towards the Earth.
- These two forces play crucial roles in determining the rocket's trajectory and achieving orbit.

1. The force of gravity which tries to pull the rocket downwards.

2. The force of friction due to the atmosphere of earth, which opposes the motion of the rocket.