
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
A straight plastic ruler rests on a horizontal table. We want to very slowly lift it into a vertical position with a force that acts at one end of the ruler and is always perpendicular to it. What should be the minimum coefficient of static friction to ensure that the ruler does not slip during the lifting process?

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