$23$

Fill in the Blank

$10$ points

A chair of mass $45$ kg on top of a spring oscillates with a period of $3$ s $.$

$($a$)$ Find the spring's force constant. You place an object on top of the chair, and it now oscillates with a period of $5$ s $.$

$k=q,$ V$/$m $[3$ sig figs$]$

$($b$)$ Find the object's mass

$m=,kg[3$ sig figs $]4$