
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
The "Long March" 2 series rocket carries "Shenzhou VII" upwards from the ground with an initial velocity of 2 km/s and a constant acceleration of 2 km/s^2. Assuming that it separates from the rocket when the altitude of the rocket above the ground is 240 km, find the time it takes for the rocket and the "Shenzhou VII" to separate.

Present the answer in LaTex format: \boxed{Your answer}
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