Question

Uma mola de constante elástica igual a 20 N/m, sofre uma deformação de 0,2m. calcule a energia potencial acumulada pela mola.

Answer 1

$Epe= \frac{k. x^{2} }{2} \\ \\ Epe= \frac{20. (0,2)^{2} }{2} \\ \\ Epe= \frac{20.0,04}{2} \\ \\ Epe= \frac{0,8}{2} \\ \\ Epe=0,4$

Answer 2

$\Large{\begin{array}{l}\tt E_p=\dfrac{k\cdot x^2}{2}\\\\\tt E_p=\dfrac{20\cdot(0,2)^2}{2}\\\\\tt E_p=\dfrac{20\cdot0,04}{2}\\\\\tt E_p=\dfrac{0,8}{2}\\\\\boxed{\boxed{\tt E_p=0,4\,J}}\end{array}}$