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

A rocket is fired vertically and contiues for 1 minute with the acceleration 20 m/s^2. Then it has used up all the fuel , and the rocket continues in free fall.

a) How high does the rocket come?

2. Relevant equations

[tex]s(displacement)=v_0t + \frac 12 at^2[/tex]

3. The attempt at a solution

I can also assume that the initial speed v0 is = 0 m/s, right?

This gives s= 0*60s + 1/2 * 20 m/s^2 * (60s)^2 = 36000 m =3.6*10^5 m.

However, the answer key of my book says s=1.5*10^5m.

Can you find something wrong in what I have done or is my book wrong?

Please help!

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# Rocket with constant acceleration - am i right or not ?

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