Question

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

Answer 1

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