Question

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

Answer 1

Epe=kx²/2

Epe=20*0,2²/2

Epe=10*0,04

Epe=0,4 J

Answer 2

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