
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 relationship between the height $h$ (unit: $m$) of an object in free fall and the time $t$ (unit: $s$) of the fall is $h=4.9t^{2}$. In an experiment, an object falls freely from a building that is $490m$ high, and the time it takes to reach the ground is ______ $s$.

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