Question

uma mola de constante elástica 40/m sofre uma deformação de 0,04 m. Calcule a energia potencial acumulada pela mola.

Answer 1

$Epel = \frac{K\ . \ X^2}{2} \\ Epel = \frac{40 \ . \ (0,04)^2}{2} \\ Epel = \frac{40 \ . \ 0,0016}{2} \\ Epel = \frac{0,064}{2} \\ Epel = 0,032 \ J$

Answer 2

$\Large{\begin{array}{l}\tt E_p=\dfrac{k\cdot x^2}{2}\\\\\tt E_p=\dfrac{40\cdot(0{,}04)^2}{2}\\\\\tt E_p=\dfrac{40\cdot0{,}0016}{2}\\\\\tt E_p=\dfrac{0{,}064}{2}\\\\\boxed{\boxed{\tt E_p=0{,}032\,J}}\end{array}}$