Calculating Maximum Altitude and Time in Air for a Weather Rocket

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SUMMARY

The discussion focuses on calculating the maximum altitude and total time in the air for a 200 kg weather rocket with 100 kg of fuel, which accelerates at 35.0 m/s² for 34.0 seconds. After fuel depletion, the rocket's ascent can be analyzed using kinematic equations. The key steps involve determining the final velocity after fuel burn and using that to calculate the maximum altitude during free flight. The total time in the air includes both the powered ascent and the free fall duration.

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Homework Statement




A 200kg weather rocket is loaded with 100 kg of fuel and fired straight up. It accelerates upward at 35.0 m/s^2 for 34.0 s, then runs out of fuel. Ignore any air resistance effects.

What is the rocket's maximum altitude?

How long is the rocket in the air?


Homework Equations



Kinematics


The Attempt at a Solution



I know i need to break the rocket into 2 sections and deal with each seperatly but I am not sure which equations to use and how to set them up?
 
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The mass is just extra data, you don't need to know it. Find how fast it is going after the fuels acceleration and then you can find out how high it goes and then you can add up the total time.
 
I think I understand that but what equations will help me get closer to the solution in each case?
 

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