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Since g is given to 2 decimal places you can assume that g is rounded to the hundredths place. That means the maximum ABSOLUTE error in g is 0.005 metres/sec2.

The percentage error, is 100*(0.005/9.81) = 0.051 (approx)

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Q: In a percentage error calculation what value do you use for g if you take it as 9.81?
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