Please help my physics homework Urgent In a lab experiment y

Please help my physics homework! Urgent!!

In a lab experiment, you are given a spring with a spring constant of 30.0 N/m. What mass would you suspend on the spring to have an oscillation period of 0.72 s when in SHM?

Answer in Kg

Thank you

Solution

Use equation,

T= 2*sqrt(m/k)

0.72= 2*3.14*sqrt(m/30)      =>    m = 0.4kg