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1. The problem statement, all variables and given/known data

A spaceship ferrying workers to Moon Base I takes a straight line path from the earth to the moon, a distance of 384000 km. Suppose it accelerates at an acceleration 19.4 m/s2 for the first time interval 14.4 min of the trip, then travels at constant speed until the last time interval 14.4 min when it accelerates at 19.4 m/s2 just coming to rest as it reaches the moon.

A. What is the maximum speed attained

B. What fraction of the total distance is traveled at constant speed

C. What total time is required for the trip

2. Relevant equations

So, I made a table

X Vo V A t

First Time interval 2011.39 0 279.36 19.4 14.4

Constant Speed 379977 279.36 ? ? ?

Last time interval 2011.39 ? ? 19.4 14.4

3. The attempt at a solution

First of all, is acceleration 0 when velocity is constant? If it is then in the constant speed time, the acceleration is zero and then the velocity would be the same. But I don't know how to get the max speed attained. What should I do? I tried using every one of the constant acceleration equations. When I tried solving for time, it was giving me 22 hours and that is not the answer. So please, if you can help me a bit out. Thanks

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# Homework Help: Another hard physics problem?

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