Solve the all parts of following question:
Question: A 1000kg weather rocket is launched straight up. The rocket motor provides a constant acceleration for 16s, then the motor stops. The rocket altitude 20s after launch is 3100m. You can ignore any effects of air resistance.
Part A: What was the rocket's acceleration during the first 16s?
Part B: What is the rocket's speed as it passes through a cloud 3100m above the ground?
I need help to find the rocket's speed as it passes through a cloud 3100m above the ground.