
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 ladder with a length of 5 m is leaning against a vertical wall. Assuming its lower end slides away from the wall at a speed of 3 m/s, find the speed at which the top end of the ladder slides down when its lower end is 1.4 m away from the wall.

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