Question

uma mola de constante elastica 40n/m sofre uma deformacao de 0,04m. Calcule a energia potencial acumulada pela mola

Answer 1

Epe=k.x²/2
Epe=40.0,04²/2
Epe=40.16.10⁻⁴/2
Epe=320.10⁻⁴
Epe=0,032 J

Answer 2

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