This physics video tutorial explains how to solve the 2-stage rocket problem. It explains how to calculate the maximum height and total flight time of the rocket as well as the final velocity of the rocket just before it hits the ground. It explains how to use the appropriate kinematics formula as well as discussing when the rocket enters projectile motion.

2 Stage Rocket Problem:
https://www.video-tutor.net/2-....stage-rocket-problem

Kinematics Problems:
https://www.video-tutor.net/ki....nematics-one-dimensi