Question

If a spring has a constant of `8 (kg)/s^2`, how much work will it take to extend the spring by `42cm`?

Answer 1

`"Work="Delta E_p=0,7056" "J`

Explanation:

`"it is gains energy while spring extending"`
`"Work="Delta E_p=1/2 k Delta x^2`
`42 cm=0,42 m`
`"Work="Delta E_p=1/2*8(0,42)^2`
`"Work="Delta E_p=4*(0,42)^2`
`"Work="Delta E_p=0,7056" "J`