Question

If a spring has a constant of `4 (kg)/s^2`, how much work will it take to extend the spring by `29 cm`?

Answer 1

so to calculate the work you need the equation that goes:
`W=1/2 * k *x^2`
with `k` being the hook constant, `x` is the distance and `W` is the work needed

so

`W = 1/2 * 4 * (29 * 10^(-2))^2`

`rArr W = 0.1682 J`

P.S. I hope you mean that `k=4(kg)/m^2`