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A spring with a spring constant of 4 N/m is stretched by Sarah's dog until extended by 2 m. How much elastic potential energy is stored by the spring?

Respuesta :

leena

Hi there!

Recall the equation for spring potential energy:

[tex]PE = \frac{1}{2}kx^2[/tex]

k = Spring constant (N/m)

x = extension of spring from equilibrium (m)

PE = Potential Energy (J)

Plug in the given values:

[tex]PE = \frac{1}{2}(4)(2^2) = \boxed{8 J}[/tex]

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