Answer:
100.2 kg
Step-by-step explanation:
The period of vibration of a spring-mass system is given by
![T=2\pi \sqrt{(m)/(k)}](https://img.qammunity.org/2020/formulas/physics/high-school/jvsrxrn49rqnjrrg60zil88jyoq4faceox.png)
where
T is the period
m is the mass
k is the spring constant
In this problem, we know
T = 1.419 s is the period
k = 1962 N/m is the spring constant
Re-arranging the equation, we can find the mass:
![m=k((T)/(2\pi))^2=(1962 N/m)((1.419 s)/(2\pi))^2=100.2 kg](https://img.qammunity.org/2020/formulas/physics/middle-school/6rruj9giffy5cp6hua4vw0qwjqf7bzpfok.png)