Question

If a spring has a constant of `4 (kg)/s^2`, how much work will it take to extend the spring by `3 cm`?

Answer 1

`W=E_p=18*10^-4J`

Explanation:

`W:"work"`
`E_p:"the stored energy for spring"`
`K:"spring constant"`
`Delta x=3 " cm=0,03 m"`
`W=E_p=1/2*K*Delta x^2`
`W=E_p=1/2*4*(0,03)^2`
`W=E_p=2*0,0009`
`W=E_p=18*10^-4J`