A $0\mathrm{.}420-kg$ mass suspended from a spring oscillates with a period of $1\mathrm{.}50$ s $.$ How much mass must be added to the object to change the period to $2\mathrm{.}30$ s $?$

$0\mathrm{.}567$ kg

You are correct.

Your receipt no$.$ is $159-9124$

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By how much leeway $($both percentage and mass$)$ would you have in the selection of the mass of the object in the previous part if you did not wish the new period to be greater than $2\mathrm{.}31$ s or less than $2\mathrm{.}29$ s $?($You do not need to enter any units.$)$

As mass $=$

As percent $=\%$

$$ Incorrect. Tries $2/99$ Previous Tries