(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 1000 kg weather rocket is launched straight up. The rocket motor provides constant acceleration for 16 s, then the motor stops. The rocket altitude 20 s after launch is 5100 m. You can ignore any effects of air resistance.

a) What was the rocket's acceleration during the first 16 s?

b) What is the rocket's speed as it passes through a cloud 5100 m above the ground?

t = 16s

2. Relevant equations

None that I know :(

3. The attempt at a solution

I assumed that at its highest point it stop accelerating and fell back down to the earth. I got 223.56 m/s from the height of 5100 m and the acceleration to gravity. I believe this is wrong, but it was the only thing to go on. Do I used this formula, 0 = 223.56t + 0.5at, where t = 16. Solved for a and got - 447.12m/s/s. This is clearly wrong because I made up positive and down negative. This is claiming it is falling at a rate of 447.12m/s/s downwards. Any hints on where to begin?

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# Homework Help: 1D motion

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