Question

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

Answer 1

Olá

k=20 N/m
x=0,2m

E=kx²/2
E=20*0,2²/2
E=0,4J

Answer 2

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